Tsymbal, O. I., & Boyko, S. M. (2023). A Case of Duodenal Bleeding in a One-Year-Old Child in the Early Postoperative Period after the Surgical Correction of Congenital Heart Defect. Ukrainian Journal of Cardiovascular Surgery, 31(3), 139-142. https://doi.org/10.30702/ujcvs/23.31(03)/TB029-139142