Boafo, Y., M. Manford, R. Barnes, E. Hema, E. Danquah, N. Awo, and U.-F. Dubiure. “Comparison of Two Dung Count Methods for Estimating Elephant Numbers at Kakum Conservation Area in Southern Ghana”. Pachyderm, vol. 45, June 2009, pp. 34-40, https://pachydermjournal.org/index.php/pachyderm/article/view/164.