Chekan, M.K., Loskutova, T.A. і Fomicheva, Y.V. 2017. Clinical case of duodenal ulcer with perforation in a woman after a planned cesarean section. Медичні перспективи. 21, 4 (Січ 2017), 164–168. DOI:https://doi.org/10.26641/2307-0404.2016.4.91491.