N. P. Alim, S. Supriatna, and Y. N. . Hanief, “Analysis of stroke rate (SR) and Stroke Length (SL) the Three Fastest Breaststroke Swimmers at the Tokyo Olympics 2021”, Phys. Educ. Sport. Stud. Res., vol. 3, no. 2, pp. 137-154, Oct. 2024.