1. McCay, C. M., Crowell, M. F. & Maynard, L. A. The effect of retarded growth upon the length of life span and upon the ultimate body size. J. Nutr. 10, 63–79 (1935).
2. Barrows, C. H. & Kokkonen, G. C. Dietary Restriction and Life Extension, Biological Mechanisms (ed. Moment, G. B.) (CRC Press Inc., Boca Raton, Florida, USA, 1982).
3. Lin, S. J., Defossez, P. A. & Guarente, L. Requirement of NAD and SIR2 for life-span extension by calorie restriction in Saccharomyces cerevisiae. Science 289, 2126–2128 (2000).
4. Weindruch, R. & Walford, R. L. The Retardation of Aging and Disease by Dietary Restriction (ed. Thomas, C. C.) (Springfield, Illinois, USA, 1988). This book provides a comprehensive overview of the changes that occur during CR.
5. Barger, J. L., Walford, R. L. & Weindruch, R. The retardation of aging by caloric restriction: its significance in the transgenic era. Exp. Gerontol. 38, 1343–1351 (2003).