Pisanniy, O.E., and V.S. Shevchenko. 1. “25-YEAR EXPERIENCE OF USING INTRAGASTRIC THERAPY TO TREAT DUODENAL ULCERS”. The Journal of V. N. Karazin Kharkiv National University, Series "Medicine", no. 7 (1), 56-59. https://periodicals.karazin.ua/medicine/article/view/7250.