Haor, B. ., Głowacka, M. ., Szczukowska, K. ., Barczykowska, . E. ., Rybka, M. ., & Ślusarz, R. . (2015). Selected health problems of 6-year and 10-year-old pupils in the educational environment. Nursing in the 21st Century, 13(4(49), 23-28. https://czasopisma.umlub.pl/piel21w/article/view/2632