Pollero, Héctor J, and Luis Chabot. “Contrast Media. Radiological Techniques in General Surgery Pictures. Possibilities and Scope of the Methods”. Cirugía Del Uruguay, vol. 41, no. 2, Feb. 1971, pp. 181-90, https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/2156.