Lacerda, A., C. Cyrne, F. Lage, T. Bento, A. Costa, Seixas Esteves, R. Costa, and Cláudio Cunha. 1988. “Ultrasound Study of Pancreatic Masses”. Acta Médica Portuguesa 1 (2). Lisbon, Portugal:133-36. https://doi.org/10.20344/amp.3556.