Runge, Jürgen. “Geomorphological Depressions (Bas-Fonds) and Present-Day Erosion Processes on the Planation Surface of Central-Togo/Westafrica”. ERDKUNDE 45, no. 1 (March 31, 1991): 52–65. Accessed December 11, 2024. https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/2224.