Aryayev, N.L, I.M Shevchenko, H.M El Mezewghi, and N.V Shevchenko. 2017. “Multifactorial Analysis of the Parameters for Immunity in Preterm Infants”. Journal of Diseases 4 (1):8-13. https://doi.org/10.18488/journal.99/2017.4.1/99.1.8.13.