Nyankovskyy, S., and O. Ivakhnenko. 2007. “The Influence of Oligosaccharide-Containing Formula Feeding on Establishment of Intestinal Biocenosis and Protective Functions of child’s Organism”. European Journal of Clinical and Experimental Medicine 5 (4):380–387. https://journals.ur.edu.pl/ejcem/article/view/13315.