ORTIZ JIMENEZ, Bersaín; JIMENEZ SANCHEZ, Leobardo; RENDON MEDEL, Roberto  and  DIAZ JOSE, Julio. Farmer schools in Mexico: an analysis from social networks. Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.spe15, pp.2899-2907. ISSN 2007-0934.