Purwaningsih, Endang, Etty Widayanti, and Yulia Suciati. “Ethanolic Periwinkle Leaf Extract Reduces Telomerase Expression in T47D Cancer Cells”. Universa Medicina 34, no. 2 (August 15, 2015): 79–86. Accessed March 29, 2024. https://univmed.org/ejurnal/index.php/medicina/article/view/12.