Szubstarski, M., P. Sekuła, Łukasz Głodek, M. Tarczyńska, K. Gawęda, and R. Mazur. “Intra-Articular Injections – Current Indications and Contraindications”. Journal of Education, Health and Sport, vol. 7, no. 8, Aug. 2017, pp. 907-16, https://apcz.umk.pl/JEHS/article/view/4873.