Mahmood, S. A., D. Pavlovic, and U. Hoffmann. “METHANOL FRACTIONATIONS OF CATHA EDULIS FROSK (CELASTRACEAE) CONTRACTED LEWIS RAT AORTA IN VITRO: A COMPARISON BETWEEN CRIMSON AND GREEN LEAVES”. African Journal of Traditional, Complementary and Alternative Medicines, vol. 6, no. 3, Apr. 2009, pp. 268-74, https://athmsi.org/journals/index.php/ajtcam/article/view/599.