Knysh, O. V., M. S. Pogorila, and Y. V. Voyda. “In Vitro Immunomodulatory Effect of Bifidobacterium Bifidum and Lactobacillus Reuteri Cell Free Extracts ”. Regulatory Mechanisms in Biosystems 11, no. 1 (April 13, 2020): 93-97. Accessed July 13, 2020. https://medicine.dp.ua/index.php/med/article/view/599.