Jesús Cordero, David H. Boshier, C.J.P. Colfer, R. T. Fenton, Shashi Kant, R. Albert Berry, NM Pasniecznik, MCM Brewer, C Fehr, JH Samuel, Jeffrey Sayer, Bruce Campbell
International Forestry Review 8 (4), 463-473, (1 December 2006) https://doi.org/10.1505/ifor.8.4.463