Liesnyi , V., Filonenko, .V. and Liesna , A. 2022. Peculiarities of diagnostics of atypical course of perforated duodenal ulcer (clinical case). Medicni perspektivi. 27, 2 (Jun. 2022), 184–188. DOI:https://doi.org/10.26641/2307-0404.2022.2.260411.