Gaystruk, N. A., T. V. Suprunova, M. V. Nadezhdin, and S. I. Ponina. “Peculiarities of Pregnancy Development and Condition of Fetus in Pregnant Women Diagnosed With Gestational and Chronic Pyelonephritis”. Journal of Education, Health and Sport, vol. 7, no. 1, Jan. 2017, pp. 423-36, https://apcz.umk.pl/JEHS/article/view/4272.