Łosień, Tomasz, Anna Mędrak, Paweł Plaskacz, Izabela Bajerska, Magdalena Reut, Emilia Dragon, Martyna Polko, and Aleksandra Cebula. 2018. “The Influence of Boccia on Self-Esteem and Increasing the Functional Capabilities of Disabled People”. Journal of Education, Health and Sport 8 (8):1099-1105. https://apcz.umk.pl/JEHS/article/view/6062.