Cortez-Pinto, H., M. L. Tavares, M. E. Camilo, and M. Carneiro de Moura. “Long-Term Enteral Nutrition by Percutaneous Endoscopic Gastrostomy”. Internal Medicine, vol. 4, no. 2, June 1997, pp. 89-91, https://revista.spmi.pt/index.php/rpmi/article/view/2204.