Ihsani, S. I., S. M. Anugrah, R. Mulyawan, and D. D. Kurniawan. “Grouping Physical Conditions of Sports Based on Leg Muscle Endurance and VO2max Using the Single Linkage Method”. Jurnal Sains Keolahragaan Dan Kesehatan, vol. 8, no. 2, Mar. 2024, pp. 101-20, doi:10.5614/jskk.2023.8.2.2.