Koya, Nahoko, Tetsu Kitamura, and Hiroo Takahashi. “The Relationship Between Service Performance and Physical Strength Focusing on Speed and Spin Rate in Japanese Elite Junior Tennis Players”. International Journal of Racket Sports Science 3, no. 2 (March 27, 2025): 10–20. Accessed September 10, 2026. https://revistaseug.ugr.es/index.php/IJRSS/article/view/33351.