A. A. Cedeño-Burbano, G. A. Galeano-Triviño, D. A. Fernández-Bolaños, D. A. Muñoz-García, and J. E. Díaz-Realpe, “Anatomical distribution of peptic ulcer in high incidence gastric cancer area”, Rev. Fac. Cienc. Salud Univ. Cauca, vol. 16, no. 3, pp. 10–16, Dec. 2014.