- "When Are Xenotransplants Right?"
- "Ethics Issues in Xenotransplantation", Arvind Koshal, MD, MS,FRCSC, Director of cardiothoracic, University of Alberta
- "Xenotransplantation", Andrew Trew, LLB, International Scholar
- "Many Scientists Contesting Xenotransplant", Steven Benowitz
- "Organ Transplants: Tackling the tough ethical questions",.Karen K. Giuliano, RN, CCRN, MSN, Critical Care Clinical Nurse Specialist,.Baystate Madical Center, Formely, Sepecialist in Kidney, Liver and Pancreas Transplantation,.University of Virginia
- "The Ethics of Xenografting", Churh of Scotland
- "Xenotransplantation: The Ethics, The Science, The Risks", Alan H. Berger
- "Frequently asked question about xenotransplants"
- "Xenotransplantation", Robert P. Lanza, David K. C. Cooper and William L. Chick
Scientific American, July 1997
- "Xenotransplantação, uma visão global da sua ética", Pedro Brandão
- "Xenotransplantation; Risks, Clinical Potencial and Future Prospects", Robert E. Michler, Director of Heart Transplant Service, Division of Cardiothoracic Surgery, Columbia-Presbyterian Medical center, New York, NY, USA