Rangkuti, Irma, Poppy Hasibuan, Tri Widyawati, and Yahwardiah Siregar. “Metformin Inhibits Growth of Breast Cancer Cell T47 through Decreasing Expression of Protein P53, BCL2 and Cyclin D1”. Journal of Medical Research and Innovation 3, no. 2 (January 1, 2019): e000164. Accessed May 26, 2019. https://jmrionline.com/jmri/article/view/164.