I. Orabueze, C. et al. 2017. Antinociceptive and Antioxidant Activities of Methanol Extract and Fractions of the Root Bark of Callichilia stenopetala Stapf. (Family Apocynaceae) In Mice. Tropical Journal of Natural Product Research (TJNPR). 1, 3 (Sep. 2017), 118–124.