1. Department of Agriculture, Society, and the Environment, El Colegio de la Frontera Sur (ECOSUR), San Cristóbal de Las Casas, México
2. Conacyt - El Colegio de la Frontera Sur (ECOSUR), San Cristóbal de Las Casas, México
3. BPV-FUNCAP Professor at the Education Faculty (Crateús), and Graduate Program on Sociology (Fortaleza), Universidade Estadual do Ceará (UECE), Brazil
4. Conacyt- Universidad Autónoma Metropolitana, Xochimilco, México