Aryaev, N. L., Marichereda, V. G., Shevchenko, I. M., Moskalenko, T. Y., El Mezevgi, J. M., & Shevchenko, N. V. (2017). Features of premature infants immune system. Journal of Education, Health and Sport, 7(5), 647–653. Retrieved from https://apcz.umk.pl/JEHS/article/view/4562