1. Armstrong N, Welsman JR. Exercise metabolism. In: Armstrong N (ed.). Paediatric exercise physiology. Edinburgh: Churchill Livingstone, 2006.
2. Asmussen E. Fatigue and physiological capacity for work. Work Environm Health 1973;10:1-8.
3. Åstrand P-O, Rodahl K, Dahl HA, Stromme SB. Textbook of work physiology, physiological bases of exercise. 4th edition. Champaign IL, USA, 2000.
4. Bar-Or O. Pediatric Sports Medicine for the practitioner, from physiologic principles to clinical applications. New York: Springer-Verlag, 1983.
5. Beunen J, Malina R. Growth and physical performance relative to the timing of the adolescent spurt. Exerc and Sport Sciences Reviews 1988;16:503-41.