For citations:

Bidaibayev A.N., Yelubayev Zh.K., Akmoldayev Ye.A., Kaimbakh Ye.A., Kizatova S.T., Kurganskaya S.A. ANALYSIS OF THE PROBLEM OF STOMACH PERFORATIONS IN NEWBORNS IN THE KARAGANDA REGION. Medicine and ecology. 2020;(2):57-66. (In Russ.)