Duque, Jorge Eduardo, Catalina López, Nataly Cruz, and Ismael Samudio. “Antitumor Mechanisms of Metformin: Signaling, Metabolism, Immunity and Beyond”. Universitas Scientiarum 15, no. 2 (June 10, 2010): 122–129. Accessed February 7, 2023. https://revistas.javeriana.edu.co/index.php/scientarium/article/view/1368.