Barnes, R., E. Danquah, E. Hema, U.-F. Dubiure, M. Manford, A. Nandjui, and Y. Boafo. “Retrospective Versus Prospective Designs for Studies of Crop-Raiding by Elephants in Kakum, Ghana”. Pachyderm, vol. 56, June 2015, pp. 44-50, doi:10.69649/pachyderm.v56i.370.