Sorokman, T., N. Chernei, S. Sokolnyk, I. Sokolnyk, and N. Popelyuk. “The Influence of Helicobacter Pylori on the Level of Endotheline-1 and Nitrogen Oxide in the Blood of Children With the Duodenal Ulcer”. Journal of Education, Health and Sport, vol. 10, no. 11, Nov. 2020, pp. 261-72, doi:10.12775/JEHS.2020.10.11.026.