1. Plant Systematic and Ecology LaboratoryHigher Teacher's Training CollegeUniversity of Yaoundé I Yaoundé Cameroon
2. Botany and Modelling of Plant Architecture and Vegetation (AMAP) LaboratoryFrench National Research Institute for Sustainable Development (IRD), Center for International Cooperation in Agricultural Research for Development (CIRAD), Scientific Research National Center (CNRS)Institut national de la recherche agronomique (INRA)Montpellier University Montpellier France
3. Unité Biogéochimie des Ecosystèmes Forestiers (BEF)INRA Champenoux France
4. Laboratory of Forest Inventory (LIF)Institut National de l'Information Géographique et Forestière (IGN) Nancy France