Alam, F., Q. N. Saqib, and A. Waheed. “Effect of Crude Saponins from Gaultheria Trichophylla Extract on Growth Inhibition in Human Colorectal Cancer Cells”. Bangladesh Journal of Pharmacology, vol. 10, no. 1, Mar. 2015, pp. 160-5, doi:10.3329/bjp.v10i1.21462.