1. Centre for Applied Ecology Prof. Baeta Neves (CEABN/ISA), InBIO, School of Agriculture, University of Lisbon, Lisbon, Portugal;
2. Forest Tenure Officer Forestry Department, FAO, Rome, Italy;
3. Department of Environment and Natural Resources, Polytechnic Institute of Bragança, Agrarian Superior School of Bragança, Campus of Santa Apolónia, Bragança, Portugal