Segla, K.N., Adjonou, K., Rabiou, H., Radji, A.R., Kokutse, A.D., Bationo,, Ali, M., Ouinsavi, and Kokou, K. 2020. Spatial Distribution of Pterocarpus erinaceus Poir. Natural Stands in the Sudanian and Sudano-Guinean Zones of West Africa: Gradient Distribution and Productivity Variation across the Five Ecological Zones of Togo. Advances in Agriculture and Fisheries Research Vol. 1. (Feb. 2020), 108-125.