1. Ritz P. Factors affecting energy and macronutrient requirements in elderly people. Public Health Nutr. 2001 Apr;4(2B): 561–8.
2. Harris JA, Benedict FG. A biometric study of basal metabolism. Publication Nℴ279. Washington DC. Carnegie Bulletin of Washington;1919
3. Fredrix EW, Soeters PB, Deerenberg IM, Kester AD, von Meyenfeldt MF, Saris WH Resting and sleeping energy expenditure in the elderly. Eur J Clin Nutr 1990;44(10): 741–7
4. WHO. 1985. Energy and protein requirements: Report of a joint FAO/WHO/UNU expert consultation. WHO Technical Report Series No. 724.
5. Schofield WN, Schofield C & James WPT (1985): Basal metabolic rate review and prediction, together with an annotated bibliography of source material. Hum. Nutr. Clin. Nutr. 39C (Suppl I).