P. B. Durst, C. Brown, H.D. Tacio, M. Ishikawa, J. Fedkiw, D.W. Maccleery, V. A. Sample, S. Higman, J. Mayers, S. Bass, N. Judd, R. Nussbaum, I Kowarik, S. Körner, E. Matzner, M. Merlo, L. Croitoru, M. Simula, M. Scherer-Lorenzen, Ch. Körner, E.-D. Schulze
International Forestry Review 7 (3), 258-269, (1 September 2005) https://doi.org/10.1505/ifor.2005.7.3.258