Books
Schulz, B. (2020): "Identification of Trees and Shrubs in Winter Using Buds and Twigs": Kew Publishing 2018, new print 2020)
Other book titles, such as the Gehölzflora (Flora of Trees and Shrubs) with 4000 illustrations (2400 of which are newly drawn from nature) in the 14th edition (2023 in print) are only available in German.