M. Samuel, O. Nzalak, C. Nwaogu, and B. Asongo, “Climate related histological changes in the stomach papillae of <em>Cephalophus Niger</em> (Gray 1846). Implications of climate dynamics and prolonged drought”, Ital J Anat Embryol, vol. 119, no. 3, pp. 219–231, Feb. 2015.