Bücher
DÖRKEN, V. M. (2012): The evolutionary relevance of vegetative long-shoot/short-shoot differentiation in gymnospermous tree species. Bibliotheca Botanica 161. – Schweitzerbart Science Publishers, Stuttgart.
DÖRKEN, V. M. & HÖGGEMEIER, A. (2009): Botanisch-dendrologische Streifzüge. – Universitätsverlag Ruhr-Universität Bochum, Bochum.