A. O. T. Ashafa, M. T. Yakubu, A.-A. A. Ogbe, and A. A. Abass, “Effect of ethanolic seed extract of Croton penduliflorous Hutch. on loperamide-induced constipated male rats”, Bangladesh J Pharmacol, vol. 7, no. 1, pp. 42–46, May 2012.