Mkrtchyan Siranush А., et al. “QUALITY OF LIFE AND DEVELOPMENTAL CHANGES OF PRETERM INFANTS AT EARLY CHILDHOOD”. Proceedings of the YSU B: Chemical and Biological Sciences, vol. 55, no. 1 (254), Apr. 2021, pp. 91-102, doi:10.46991/PYSU:B/2021.55.1.091.