Restrepo, Claudia, Mónica Henao, Lina Álvarez, and Jorge Zapata. “Alcoholic Extract of the Human Placenta: Chemical Composition and Potential Applications”. Medicina UPB 18, no. 2 (December 15, 1999): 143–151. Accessed August 26, 2026. https://revistas.upb.edu.co/index.php/medicina/article/view/3707.