Perenc, Lidia, Barbara Cyran-Grzebyk, Katarzyna Zajkiewicz, and Katarzyna Walicka-Cupryś. 2018. “Diversification of Results of Orientating Questionnaire of Motoric and Psycho-Social Development in Regard to the Level of Educational Maturity (school Readiness) in Prematurely Born Children”. European Journal of Clinical and Experimental Medicine 16 (4):289–299. https://doi.org/10.15584/ejcem.2018.4.5.