1. Aziz, AR, Chia, M, and Teh, KC. The relationship between maximal oxygen uptake and repeated sprint performance indices in field hockey and soccer players.;J Sports Med Phys Fitness,2000
2. Energy demands in competitive soccer.;Bangsbo;J Sport Sci,1994
3. Bangsbo, J, Norregaard, L, Thorsoe, F. Activity profile of competitive soccer.;Can J Sport Sci,1991
4. Seasonal variation in fitness variables in professional soccer players.;Casajus;J Sports Med Phys Fitness,2001
5. Castagna, C, Impellizzeri, FM, Chamari, K, Carlomagno, D, and Rampinini, E. Aerobic fitness and yo-yo continuous and intermittent tests performances in soccer players: a correlation study.;J Strength Cond Res,2006