Publications

Selected scientific articles

  • Fischer, J.; Thümmler, K.; Zlotnikov, I.; Mikhailova, D.; Fischer, S.: Synthesis of Cellulose Acetate Butyrate Microspheres as Precursor for Hard Carbon-Based Electrodes in Symmetric Supercapacitors. Polymers (2024) 16(15), 2176. https://doi.org/10.3390/polym16152176

  • Fischer, J.; Wolfram,L.; Fischer,S.; Mikhailova, D.: Carbons derived from regenerated spherical cellulose as anodes for Li-ion batteries at elevated temperatures. ChemPhysChem (2024) 25(8), e202300833

  • Scheer,A.; Fischer, J.; Bakhshi, A.; Bauer, W.; Fischer, S.; Spirk, S.: Fusion of cellulose microspheres with pulp fibers: Creating an unconventional type of paper. Carbohydrate Polymers (2024) 338, 122207https://doi.org/10.1016/j.carbpol.2024.122207

  • Elschner, T.; Geissler, A.; Adam, J.; Joseph, Y.; Fischer, S.: Biomimetic Dehydrogenation of Non-Conventional Lignin Monomers on Cellulose Ferulate Interfaces. Macromolecular Bioscience (2024) https://doi.org/10.1002/mabi.202300556

  • Kosan, B; Thümmler, K.; Meister; F.; Römhild, K.: Suitable dissolving pulps and their impacts on solution spinning of cellulose man-made fibers. Cellulose https://doi.org/10.1007/s10570-023-05721-8; published online 10 January 2024

  • Fiedler, M.; Thümmler, K.; Tech, S.; Barth, W.; Zahel, M.: Miscanthus als Rohstoff für die Zellstoff- und Papierherstellung. Wochenblatt für Papierfabrikation 10/2023 S.29-34

  • Nong, J.P.; Nawroth, P.; Selbmann, F.; Bremer M.; Joseph, Y; Fischer, S.: Ligninsulfonate-based hydrogel films for ion sensing, European Polymer Journal, (2023) 196 DOI:10.1016/j.eurpolymj.2023.112317

  • Elschner, T.; Fischer, S.: Reconsidering the feruoylation of arabinoxylan by Mitsunobu reaction with a di-arabinofuranosyl-xylotriose model. Cellulose (2023)

    https://doi.org/10.1007/s10570-023-05363-w

  • Elschner, T.: Formation of Polysaccharide-Based Nanoparticles and Their Biomedical Application. In Functional Biomaterials (eds T. Mohan and K.S. Kleinschek) (2023) https://doi.org/10.1002/9783527827657.ch9

  • Zeng, K.; Doberenz,F.; Lu, Y.-T.; Nong, J.P.; Fischer, S.; Groth, T.; Zhang K.: Synthesis of Thermoresponsive PNIPAM-Grafted Cellulose Sulfates for Bioactive Multilayers via Layer-by-Layer Technique; ACS Allied Materials & Interfaces (2023)  14(43) DOI:10.1021/acsami.2c12803

  • Elschner, T.; Brendler, E.; Fischer, S.: Overcoming challenges in the synthesis of a lignin-carbohydrate complex (LCC) model: Mitsunobu versus Appel product. Cellulose (2023)

    https://doi.org/10.1007/s10570-023-05046-6

  • Sander, K.; Dütsch, L.; Bremer, M.; Fischer, S.; Vogt, C.; Zuber, J.: Characterization of Soluble and Insoluble Lignin Oligomers by Means of Ultrahigh Resolving Mass Spectrometry; Energy & Fuels (2023) 37 (1), 439-449 DOI: 10.1021/acs.energyfuels.2c03538

  • Barth, W. A.; Dietrich, T.;  Freese, M.; Fischer, S.; Wagenführ, A.: Acetosolv-delignification and IPA-acetylation of beech wood veneer. 10th Hardwood conference proceedings (2022), 211-216, University of sopron press; Sopron, Hungary, 12-14 October 2022, https://doi.org/10.35511/978-963-334-446-0 

  • Wehsener, J; Bremer, M.; Haller, P.; Fischer, S.: Bending tests of delignified and densified poplar, Wood Material Science & Engineering (2022), https://doi.org/10.1080/17480272.2022.2134049
  • Thümmler, K.; Fischer, J.; Fischer; S.; Kosan, B.; Meister, F.: Lyohemp™ fibres from hemp shive dissolving pulp. LENZINGER BERICHTE 97 (2022) 25 – 31
  • Fischer, J.; Pohle, B.; Dmitrieva; E.; Thümmler, K.; Fischer, S. Mikhailova, D.: Symmetric supercapacitors with cellulose-derived carbons and Na2SO4 electrolytes operating in a wide temperature range. Journal of Energy Storage 55 (2022), https://doi.org/10.1016/j.est.2022.105725
  • Elschner, T.; Adam, J.; Lesny, H.; Joseph, Y.; Fischer, S.: Growing of Artificial Lignin on Cellulose Ferulate Thin Films. Biomacromolecules (2022) 23, 5, 2089-2097 https://pubs.acs.org/doi/10.1021/acs.biomac.2c00096

  • Elschner, T.; Brendler, E.; Fischer, S.: Highly selective Mitsunobu esterification of cellulose with hydroxy-cinnamic acids. Macromolecular Chemistry and Physics (2021)

    https://doi.org/10.1002/macp.202100232

  • Bremer, M.; Oktaee, J.; Einer, D.; Fischer, S.; Wagenführ, A.: Investigation on the potential of poplar bark from short-rotation coppices as bio-based fungicidal additives; BioEnergy Research (2021); https://doi.org/10.1007/s12155-021-10253-9

  • Gebke, S.; Thümmler, K.; Sonnier, R.; Tech, S.; Wagenführ, A.; Fischer, S.: Suitability and modification of different renewable materials as feedstock for sustainable flame retardants. Molecules 25 (2020), 5122; doi:10.3390/molecules25215122

  • Gebke, S.; Thümmler, K.; Sonnier, R.; Tech, S.; Wagenführ, A.; Fischer, S.: Flame Retardany of Wood Fiber Materials Using Phosphorus-Modified Wheat Starch. Molecules 25 (2020) 1 -21 https://doi.org/10.3390/molecules25020335

  • Jahn, A.; Thümmler, K.; Gebke, S.; Kahl, M.; Aubel, I.; Fischer, S.; Bertau, M.: Utilization of hemicelluloses as example for holistic recovery of agricultural residues. CIT 92/11 1764-1771 (2020)

  • Hofmann, L.; Delenk, H.; Unbehaun H.; Feldner, A.; Mensch, A.; Thümmler, K.: Rindenbasierte Flammschutzmittel für Zellulosedämmung. Holztechnologie 61/3 5-10 (2020)

  • Günther, B. ; Starke, N.; Meurer, A.; Bues, C.-T.; Fischer, S.; Bremer, M.; Freese, M.: Impact of Storage Method on the Chemical and Physical Properties of Poplar Wood from Short-Rotation Coppice Stored for a Period of 9 Months; BioEnergy Research (2020);  https://doi.org/10.1007/s12155-020-10231-7

  • Freese, M., Mensch, A., Bremer, M., Schaller, J., Schöbitz M., Fischer, S.:

    Influence of curing temperature on the thermal properties and UV stability of hydroxypropyl cellulose cross-linked with glyoxylic acid. Cellulose Chem. Technol. 53(5-6) (2019) 609-616 https://doi.org/10.35812/CelluloseChemTechnol.2019.53.60

  • Trepte, C. Freese, M.; Bremer, M. Fischer, S.: Fast growing larch hybrids as a potential resource for Kraft pulping. IPW 1-2/2020; http://www.ipw.online/SubscriptionEN/Article/c15d283beb27055b3ab40f0effd568a5c85d4bd5

  • Einer, D.; Bremer, M.; Oktaee, J. Fischer, S. Wagenführ, A.: Identification of fungicidal components in poplar bark from short rotation plantations. Holztechnologie 60 (2019) 5-17

  • Hoffmann, A.; Bremer, M.; Fischer, S.: Determination of Monomeric Building Blocks by Py-GC/ MS of Lignins from Agricultural Residues; Austin Biomolecules Open Access (2019) 3(1): 1013

  • Hoffmann, A.; Nong, J. P.; Porzel, A.; Bremer, M.; Fischer, S.: Modification of Ligniboost Kraft Lignin from softwoods with dihydroxybenzens. Reactive and Functional Polymers 142 (2019)112-118

  • Pospiech, D.; Korwitz, A.; Eckstein, K.; Komber, H.; Jehnichen, D.; Suckow, M.; Lederer, A.; Arnhold, K.; Göbel, M.; Bremer, M.; Hoffmann, A.; Fischer, S.; Werner, A.; Walther, T.; Brünig, H.; Voit, B.: Fiber formation and properties of polyester/lignin blends. Journal of Applied Polymer Science (2019)

  • Strätz, J.; Liedmann, A.; Trutschel, M.-L.; Mäder, K.; Groth, T.; Fischer, S.: Development of hydrogels based on oxidized cellulose sulfates and carboxymethyl chitosan. Cellulose 26 (2019) 7371-7382

  • Gebke, S.; Thümmler, K.; Fischer, S.; Kahl, M.; Aubel, I.; Bertau, M.: Nutzung von Hemicellulose und Pektin aus landwirtschaftlichen Reststoffe. Holztechnologie 60 (2019) 52-58

  • Heise, K.; Hobisch, M.; Sacarescu, L.; Maver, U.; Hobisch, J.; Reichelt, T.; Sega, M.; Sega, M.; Spirk, S.: Low-Molecular-Weight Sulfonated Chitosan as Template for Anticoagulant Nanoparticles. International Journal of Nanomedicine 13 (2018) 4881-4894

  • Audu, I. G.; Brosse, N.; Winter, H:; Hoffmann, A.; Bremer, M.; Fischer, S.; Laborie, M.-P.:  Acetyl Groups in Thypha capensis. Fate if Acetatesduring Organosolv and Ionosolv Pulping. Polymers 10 (2018) 619-633

  • Beyer, M.; Kranitz, K.; Bremer, M.; Peters, J.; Fischer, S.; Bues, C.-T.; Niemz, P.: Effect of Natural Aging on the Chemical Composition of Norway Spruce, Fir, and European Oak Wood. Pro Ligno 14(2) (2018) 3-19

  • Audu, I. G.; Ziegler-Devin, I.; Winter, H.; Bremer, M.; Hoffmann, A.; Fischer, S.; Laborie, M.-P.; Brosse, N. : Impact of Ionoc Liquid 1-Ethyl-3-methylimidazolim Acetate Mediated Extraction on Lignin Features. Green and Substainable Chemistry 7 (2017) 114-140

  • Esmaeilzadeha, P.; Köwitscha, A.; Heyroth, F.; Schmidt, G.; Fischer, S.; Richter, K.; Groth, T.: Synthesis of thiolated polysaccharides for formation ofpolyelectrolyte multilayers with improved cellular adhesion. Carbohydrate Polymers 157 (2017) 1205-1214

  • Heise, K.; Roßberg, C.; Strätz, J.; Bäurich, C.; Brendler, E.; Keller, H.; Fischer, S.: Impact of pre-treatments on properties of lignocelluloses and their accessibility for a subsequent carboxymethylation. Carbohydrate Polymers 162 (2017) 82-89
  • Neu, S. et al. Silicon availability modifies nutrient use efficiency and content, C:N:P stoichiometry, and productivity of winter wheat (Triticum aestivum L.). Sci. Rep. 7, 40829; doi: 10.1038/srep40829 (2017) 
  • Rohowsky, J.; Heise, K.; Fischer, S.; Hettrich, K.: Synthesis and characterization of novel cellulose ether sulfates. Carbohydrate Polymers 142 (2016) 56-62
  • Starke, R.; Rosenthal, M.; Bues, C.-T.; Bremer, M.; Fischer, S.: Thermal modification of African alpin bamboo. Eur. J. Wood Prod. 74 (2016) 1289-1296
  • Unzué-Belmonte, D.; Struyf, E.; Clymans, W.; Tischer, A.; Potthast, K.; Bremer, M.; Meire, P.; Schaller, J.: Fire Enhances Solubility of biogenic Silica. Sci. Total Environ (2016)
  • Fischer, S.; Thümmler, K.; Bender, H.; Passauer, L.; Wagenführ, A.; Tech, S.: Entwicklung von Holzwerkstoffen mit Flammschutzmitteln auf Basis von Biopolymeren. Holztechnologie 56 (2015) 5-9
  • Rossberg, C.; Bremer, M.; Machill, M.; König, S.; Kerns, G.; Boeriu, C.; Windeisen, E.; Fischer, S.: Separation and characterisation of sulphur-free lignin from different agricultural residues. Industrial Crops and Products 73 (2015) 81-89
  • Steffien, D.; Rossberg, C.; Kiehle, R.; Bremer, M.; Fischer, S.; Bertau, M.: Dehydratisierung von bioethanolaus Weizenstroh zur Herstellung von Bioethylen. Chemie Ingenieur Technik
  • Schaller, J.; Tischer, A.; Struyf, E.; Bremer, M.; Belmonte, D.U. Potthast, K.: Fire enhances Phosphorus availabilityin topsoils depending on binding properties. Ecology 56 (2015) 5-9
  • Appelt, J.; Gohrbandt, A.; Peters, J.; Bremer, M.; Fischer, S.: Hydrogenolysis of lingin in ZnCl2 and KCl as an inorganic molten salt medium. Holzforschung 69(5) (2015) 523-530
  • Fischer, S.; Thümmler, K.; Bender, H.; Passauer, L.; Wagenführ, A.; Tech, S.: Entwicklung von Holzwerkstoffen mit Flammschutzmitteln auf Basis von Biopolymeren. Tagungsbeitrag zum 16. Holztechnologischen, Schriftenreihe Holz- und Papiertechnik 12 (2014) 56-65
  • Rossberg,C.; Steffien, D.; Bremer, M.; König, S.;  Carvalheiro, F.; Duarte, L.C.; Moniz, P.; Hoernicke, M.; Bertau, M.; Fischer, S.: Pulp properties resulting from different pretreatments of wheat straw and their influence on enzymatic hydrolysis rate Bioresource technology 169 (2014) 206-2012
  • Köwitsch, A.; Abreu, M.J.; Chalotre, A.; Hielscher, M.; Fischer, S.; Mäder, K.; Groth, T.: Synthesis of thiolated glycosaminoglycans and grafting  to solid surfaces; Carbohydrate Polymers 114 (2014) 344-351
  • Aggarwal,N.; Altgärde,N.; Svedhem,S.; Zhang,K.; Fischer, S., Groth, T.: Study on multilayer structures prepared from heparin andsemi-synthetic cellulose sulfates as polyanions and their influence oncellular response. Colloids and Surfaces B: Biointerfaces 116 (2014) 93– 103
  • Aggarwal,N.; Altgärde,N.; Svedhem,S.; Zhang,K.; Fischer, S., Groth, T.: Effect of Molecular Composition of Heparin and Cellulose Sulfate on Multilayer Formation and Cell Response. Langmir 29(45) (2013) 13853-13864
  • Zhang, K.; Fischer, S.; Geissler, A.; Brendler, E.; Gebauer, K.: Synthesis of carboxyl cellulose sulfates with regioselective sulfation and regiospecific oxidation using cellulose trifluoroacetate as intermediates. Cellulose 20 (2013) 4
  • Bremer, M.; Fischer, S.; Nguyen, T.C.; Wagenführ, A.; Phuong, L.X.; Dai V.H.: The effects of thermal modification on the properties of two Vietnamese bamboo species, Part II: Effects on chemical composition. BioResources 8 (1) (2013) 981-993

  • Zhang, K.; Geissler, A.; Fischer, S.; Brendler, E.;  Bäucker, E.: Solid-State Spectroscopic Characterization of α-Chitins Deacetylated in Homogeneous Solutions.

    J. Phys. Chem. B 116 (2012) 4584−4592

  • Weltrowski, A.; da Silva Almeida, M.-L.; Peschel, D.; Zhang, K.; Fischer, S.; Groth, T.:

    Mitogenic Activity of Sulfated Chitosan and Cellulose Derivatives is Related to Protection of FGF-2 from Proteolytic Cleavage. Macromol. Biosci.12(6) (2012) 740-750

  • Nguyen, C.T.; Wagenführ, A.; Phuong, L.X.; Dai, V.H.; Bremer, M.; Fischer, S.: The effects of thermal modification on the properties of two Vietnamese bamboo species. Part I: Effects on physical properties. BioResources 7 (4) (2012) 5355-5366
  • Zhang, K.; Weltrowski, A.; Peschel, D.; Fischer, S.; Groth, T.: Synthesis and Characterization of Biologically Active Chitosan Sulfates. ACS Symposium Series, Vol. 1107 (2012) 297-314
  • Zhang K.; Fischer, S.; Geissler, A.; Brendler, E.: Analysis of carboxylate groups in oxidized never-dried cellulose II catalyzed by TEMPO and 4-acetamide-TEMPO. Carbohydr Polym 87 (1) (2012) 894-900
  • Peschel, D.; Zhang, K.; Fischer, S.; Groth, T.: Modulation of osteogenic activity of BMP-2 by cellulose and chitosan derivatives. Acta Biomaterials 8 (1) (2012) 183-193
  • Zhang, K.; Feldner, A.; Fischer, S.: FT Raman spectroscopic investigation of cellulose acetate. Cellulose 18 (4) (2011) 995-1003
  • Thümmler, K., Fischer, S., Feldner, A., Weber, V., Ettenauer, M., Loth, F., Falkenhagen, D.: Preparation and characterization of cellulose micropheres. Cellulose 18 (2011) 135-142
  • Zhang, K.; Peschel, D.; Bäucker, E.; Groth, T.; Fischer, S.: Synthesis and characterisation of cellulose sulfates regarding the degrees of substitution, degrees of polymerisation and morphology. Carbohydrate Polymers 83 (4) (2011) 1659-1664
  • Zhang, K.; Brendler, E.; Geissler, A.; Fischer, S.: Synthesis and spectroscopic analysis of cellulose sulfates with regulable total degrees of substitution and sulfation patterns via 13C NMR and FT Raman spectroscopy. Polymer 5 (2011) 26-32
  • Zhang, K.; Brendler, E.; Gebauer, K.; Gruner, M.; Fischer, S.: Synthesis and characterisation of low sulfoethylated cellulose. Carbohydrate Polymers 83 (2011)  616-622
  • Zhang, K.; Peschel, D.; Helm, J.; Groth, T.; Fischer, S.: FT Raman investigation of novel chitosan sulfates exhibiting osteogenic capacity. Carbohydrate Polymers 83 (2011) 60-65
  • Passauer, L.; Bender, H.; Fischer, S.: Synthesis and characterization of starch phosphates. Carbohydrate Polymers 82 (2010)  809-814
  • Weber, V.; Ettenauer, M.; Linsberger, I.; Loth, F.; Thümmler, K.; Feldner, A.; Fischer, S.; Falkenhagen, D.: Functionalization and Application of Cellulose Microparticles as Adsorbents in Extracorporeal Blood Purification. Macromolecular Symposia Volume 294, Issue 2 (2010) 90–95
  • Zhang, K.; Helm, J.; Peschel, D.; Gruner, M.; Groth, T.; Fischer, S.: NMR and FT Raman characterisation of regioselectively sulfated chitosan regarding the distribution of sulfate groups and the degree of substitution. Polymer 51 (2010)  4698-4705
  • Zhang, K.; Peschel, D.; Klinger, T.; Gebauer, K.; Groth, T.; Fischer, S.: Synthesis of carboxyl cellulose sulfate with various contents of regioselectively introduced sulfate and carboxyl groups. Carbohydrate Polymers 82 (2010)  92-99
  • Zhang, K.; Helm, J.; Peschel, D.; Gruner, M.; Groth, T.; Fischer, S.: NMR and FT Raman characterisation of regioselectively sulfated chitosan regarding the distribution of sulfate groups and the degree of substitution. Polymer 51 (2010) 4698-4705
  • Rosenthal, M.; Fischer, S.; Bues, C.T.: Energiedisperse Röntgenmirkroanalyse und Ramanspektroskopie als topochemische Untersuchungsmethode in der Holzforschung. Holztechnologie 51 (2010) 1
  • Peschel, D.; Zhang, K.; Aggarwal, N.; Brendler, E.; Fischer, S.; Groth, T.: Synthesis of novel celluloses derivatives and investigation of their mitogenic activity in the presence and absence of FGF2. Acta Biomaterialia 6 (2010) 216-2125
  • Zhang, K.; Brendler, E.; Fischer, S.: FT Raman investigation of sodium cellulose sulfate. Cellulose 17 (2010) 427
  • Peters, J.; Pfriem, A.; Horbens, M.; Fischer, S.; Wagenführ, A. ;: Emissions from thermally modified beech wood, their reduction by solvent extraction and fungicidal effect of the organic solvent extracts. Wood Material Science and Engineering, 4(1) (2009) 61-66

Selected conference lectures

Fischer, S.; Bremer, M.; Nong, J.: Structural Design of Lignin as Raw Material for Carbon Fibres; International Textile Conference, Dresden (2023)

Böhle, A.; Nong, J. P.; Bremer, M.; Fischer, S.: Iminodiacetic acid modified Kraft lignin hydrogels for application as adsorption materials for heavy metals; 21st ISWFPC, Venedig (2023)

Fischer, S.; Nong, J.P.; Bremer, M.: Synthesis, Characterization and Application of Lignin hydrogels; 21st ISWFPC, Venedig (2023)

Nong, J. P.; Bremer, M.; Fischer, S.: Adsorption of rare earths with lignin hydrogels from aqueous media and selective desorption; Poster, 21st ISWFPC, Venedig (2023)

Bremer, M.; Hoffmann, A.; Arndt, V.; Fischer, S.: Influence of a fractionation of LignoboostTM lignin on lignin structure and sorption properties for copper(II) ions; Poster, ACS Spring 2023, Indianapolis (2023)

Nong, J.P.; Nawroth, P.; Selbmann, F.; Bremer M.; Joseph, Y; Fischer, S.: Binding of lignin sulfonate hydrogel to glass surfaces for application as sensor material; ACS Spring 2023, Indianapolis (2023)

Nong, J. P.; Bremer, M.; Fischer, S.: Sorption of Metal Ions, Dyes and Crude Oil on Lignin Hydrogels; Università degli Studi di Milano-Bicocca, Mailand (2022)

Elschner, T.; Brendler, E.; Fischer, S.: Keynote lecture - Highly selective mitsunobu reaction of cellulose with hydroxycinnamic acids. 5th EPNOE Junior Scientist Meeting (2022), Aveiro, Portugal

Nong, J. P.; Hoffmann, A.; Bremer, M.; Fischer, S.: Lignin-based hydrogel as adsorption material for metal ions. WOODCHEM 2019, Nancy, Frankreich

Trepte, C.; Freese, M.; Fischer, S.: Shorter rotation time: Fast growing Larch hybrids as a potential resource for kraft pulping. 20th ISWFPC (2019), Tokio, Japan

Hoffmann, A.; Thüne, J. F.; Bremer, M.; Fischer, S.: Organosolv pulping of wheatstraw and miscanthus for vanillin production. First International Lignin Symposion (2019) Sapporow, Japan

Gebke, S.; Thümmler, K.; Fischer, S.: Flame retardatns based on plant raw materials. EPNOE (2018), Alès, Frankreich

Hoffmann, A.; Nong, J. P.; Bremer, M.; Fischer, S.: Influence of fractionation and phenolation of Lignoboost-Kraft-lignin on formation and properties of lignin-hydrogels. ; ACS spring meeting (2018), New Orleans, USA

Gebke, S.; Thümmler, K.; Kahl, M.; Bertau, M: Separierung und Modifizierung von Hemicellulose aus landwirtschaftlichen Reststoffen. 18. Holztechnologisches Kolloquium (2018), Dresden, Deutschland

Bremer, M.: Lignin - Struktur, Modifizierung, Anwendung. Zellcheming Fachausschuss Zellstoffherstellung (2017), Kematen, Österreich

Strätz, Juliane; Liedmann, A.; Gröning, M.; Mäder, K.; Groth, Thomas; Fischer, S.: Fast crosslinking hydrogels based on oxidized cellulose sulphates as tailored scaffolds for cartilage tissue engineering. 5th EPNOE International Polysaccaride Conference (2017), Erfurt, Deutschland

Fischer, S.; Bremer, M.; Werner, A.; Freese, M.; Bley, T.: Structural Design of Lignin as Raw Material for Carbon Fibers. 16th AUTEX World Textile Conference (2016), Ljubljana, Slovenien

Bremer, M. Unbehaun, H.: Ligningewinnung aus landwirtschaftlichen Reststoffen und dessen technische Anwendungsmöglichkeiten. 21. Fachtagung - Nutzung nachwachsende Roghstoffe - Bioökonomie 3.0 (2016), Dresden, Deutschland

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Stephan Bonn
Last modified: Jul 31, 2024