Geffner, Luis, Teodoro Maldonado, Ernesto Peñaherrera, y Yan Duarte Vera. 2007. «Surgical Myocardial Implantation of Human Fetal Stem Cells in Heart Failure Patients». Oncología (Ecuador) 17 (1). https://roe.solca.med.ec/index.php/johs/article/view/387.