Reference Library: certification: category - s. Economic valuation & PES
January, 2010. Guariguata, MR; Garcia-Fernandez, C; Sheil, D; Nasi, R; Herrero-Jáuregui, C; Cronkleton; Ingram, V. Forest Ecology and Management. Volume 259, Issue 3. pp: 237-245. doi:10.1016/j.foreco.2009.11.013
