Skopowska, A., M. Biernacki, M. Dekowska, M. Łukowicz, S. Łukasz, and A. Filarecka. “Therapeutic Procedures in Shoulder Impingement Syndrome (SIS) for Professionally Active People: Randomized Research”. Pedagogy and Psychology of Sport, vol. 4, no. 2, Mar. 2018, pp. 26-42, doi:10.12775/PPS.2018.008.