Ranst, Eric Van, Department of Geology, Ghent University, Campus Sterre (S8), Krijgslaan 281 (S8), B-9000 Gent, Belgium
Rockson, Takinam Kwaku Roessler, R., University of Kassel and Georg-August-Universität Göttingen, Animal Husbandry in the Tropics and Subtropics, Germany