“The Effect of Intermittent Fartlek Training On The Aerobic Endurance Ability of Extra-Curricular Basketball Players At SMAN 1 Blega”, Compet. J. Pendidik. Kepelatihan Olahraga, vol. 17, no. 2, pp. 1227–1232, Jun. 2025, doi: 10.26858/cjpko.v17i2.154.