1. Universidad Nacional de Colombia,Facultad de Ciencias Humanas,Departamento de Geografía
2. Justus Liebig University Giessen,Institute of Landscape Ecology and Resource Management, Research Centre for Biosystems, Land Use and Nutrition (iFZ),Giessen,Germany
3. Justus Liebig University Giessen,Center for International Development and Environmental Research (ZEU),Giessen,Germany