Trejo-Ávila, M.E., Solórzano-Vicuña, D., Valenzuela-Salazar, C., Muñoz-Gutiérrez, R., Romero-Loera, S. and Moreno-Portillo, M. 2016. Surgical treatment of perforated gastroduodenal peptic ulcers:comparison between open and laparoscopic approach. International Surgery Journal. 3, 4 (Dec. 2016), 1987–1991. DOI:https://doi.org/10.18203/2349-2902.isj20163565.