For citations:

Kovalenko V.V., Shesterina E.K., Balako A.I. Comparative Anatomic Description of the Mucosal Folds of the Duodendrum in Newborns and Adults. Health and Ecology Issues. 2018;(4):42-47. (In Russ.) https://doi.org/10.51523/2708-6011.2018-15-4-8