Węgrzyniak, A., Wokurka, W., Dudek, I. and Piech, P. (2021) “What are the newest outcomes about Legg-Calve-Perthes disease etiology after 110 years over its discovering ? – literature review”, Journal of Education, Health and Sport, 11(9), pp. 396–400. doi: 10.12775/JEHS.2021.11.09.050.