Attempts in identifying the origin of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands in Germany.

König, A. O., Maurer, W., Schmitt, H. P., Arenhövel, W., Rau, H. M., Stephan, B. R., (2007). Conifers network. Report of the fourth meeting, Pitlochry, United Kingdom, 18-20 October, 2003, 53-60. International Plant Genetic Resources Institute (IPGRI), Rome, Italy. English language

Genetische Variation an Enzym-Genloci der Buche. / Genetic variation at enzyme gene loci of beech.

Starke, R., Hattemer, H. H., Ziehe, M., Vornam, B., Turok, J., Herzog, S., Maurer, W., Tabel, U., (1995). Allgemeine Forst- und Jagdzeitung 166(8), 161-167. German language