1. Kreider RB, Fry AC and O’Toole ML (eds.). Overtraining in Sport. Human Kinetics Publishers, Champaign, IL, 1998.
2. Williams MH. Nutrition for Health, Fitness and Sport. WCB/McGraw-Hill, Dubuque, IA, 1999.
3. Berning JR. Energy intake, diet, and muscle wasting. In: Kreider RB, Fry AC, O’Toole ML eds., Overtraining in Sport. Human Kinetics Publishers, Champaign, IL, 1998, pp. 275–288.
4. American College of Sports Medicine. Encyclopedia of Sports Sciences and Medicine. Macmillan, New York, pp. 1128–1129.
5. Food and Nutrition Board. National Research Council: Recommended Dietary Allowances, revised. National Academy of Sciences. Washington, DC, 1989.