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, Vol. 11, no. 1, Apr. 2020, pp. 93-97, doi:10.15421/022013.