Skalski, D. W., N. Tsyhanovska, and P. Kreft. “IMPROVING BACKSTROKE SWIMMING TECHNIQUE BY USING UNCONVENTIONAL OBJECTS”. Rehabilitation and Recreation 18, no. 3 (November 1, 2024): 231–238. Accessed June 14, 2026. https://rehabrec.org/index.php/rehabilitation/article/view/520.