M. J. THEMANE, L. L. J. KOPPES, H. C. G. KEMPER, K. D. MONYEKI, and J. W. R. TWISK, “The Relationship between Physical Activity, Fitness and Educational Achievement of Rural South African Children: 南非鄉鎮兒童身體活動、體適能與學業成就的關係”, ajper, vol. 12, no. 1, pp. 48–54, Jun. 2006.