Jariono, G., Nurhidayat, P. Indarto, V. S. Sistiasih, H. Nugroho, and U. Maslikah. “Physical Activity Training Methods to Improve the Physical Condition of Volleyball Players: A Systematic Review”. Physical Education Theory and Methodology, vol. 24, no. 1, Feb. 2024, pp. 118-29, doi:10.17309/tmfv.2024.1.15.