1. Ackzell L (2002) On the doorstep to new legislation on forest reproductive material—policy framework and legislation on trade with forest reproductive material. For Genet Resour 30:52
2. Adams WT, Zuo J, Shimizu JY, Tappeiner JC (1998) Impact of alternative regeneration methods on genetic diversity in coastal Douglas-fir. For Sci 44:390–396
3. Barner H (1973) Procurement of Douglas-fir seed for provenance research. In: Proceedings of IUFRO working party on Douglas-Fir provenance, Göttingen, West Germany, pp 82–89
4. Bastien J, Sanchez L, Michaud D (2013) Douglas-Fir (Pseudotsuga menziesii (Mirb.) Franco). In: Pâques L (ed) Forest tree breeding in Europe: current state-of-the-art. Springer, Dodrecht, pp 325–373
5. Bauer W, Braun W, Braunger M, Dörr T, Ebinger T, Göckel C, Karopka M, Mann P, Morell M, Schmid R, Thumm H, Wieners M (2009) Pflanzgut und Pflanzung. ForstBWPraxis, Ministerium für Ernährung und Ländlichen Raum, Stuttgart