SHEVCHENKO, N. A. and BABINETS, L. S. The effectiveness of systemic enzyme therapy in complex treatment chronic pancreatitis in old age. Journal of Education, Health and Sport. Online. 30 June 2021. Vol. 11, no. 6, pp. 209-216. [Accessed 19 July 2024]. DOI 10.12775/JEHS.2021.11.06.023.