Karpovich, O. A., and V. I. Shyshko. “THE PROTECTIVE ACTION OF MELATONIN IN GASTROESOPHAGEAL REFLUX DISEASE”. HEPATOLOGY and GASTROENTEROLOGY, Vol. 3, no. 1, June 2019, pp. 61-65, doi:10.25298/2616-5546-2019-3-1-61-65.