Kałużna, Anna, Krystian Kałużny, Łukasz Wołowiec, Ola Płoszaj, Walery Zukow, Bartosz Kochański, and Wojciech Hagner. 2017. “The Prevention of Spinal Pain - a Systematic Review”. Journal of Education, Health and Sport 7 (7):912-26. https://apcz.umk.pl/JEHS/article/view/4822.