Hidayat, Taufiq, Heryanto Muhammad, Sapto Wibowo, Sri Wicahyani, Amalia Tazkiyah, and Lutfhi Abdil Khuddus. “Concentration Exercises for Volleyball Players: A Systematic Review”. Proceeding of International Joint Conference on UNESA 3, no. 1 (August 22, 2025): 175–183. Accessed September 2, 2025. https://proceeding.unesa.ac.id/index.php/pijcu/article/view/6244.