1. Alberts, B., Bray, D., Johnson, A., Lewis, J., Raff, M., Roberts, K., & Walter, P. (1997). Essential cell biology (p. 1). New York, London: Garland.
2. Gompertz, B. (1825). The nature of the function expressive of the law of human mortality, and on a new model of determining the value of life contingencies Philosophical Transactions of the Royal Society, 2, 513.
3. Bertalanaffy, V. L. (1957) Quantitative laws in metabolism and growth. The Quarterly Review of Biology, 32, 217.
4. Scharf, I. H. (1980). In W. Beier & R. Rosen (Eds.), Wachstum der Medizin. Biophysikalische Grundlagen (2 edn., pp. 62–131). Fischer Verlag.
5. Banavar, J. R., Damuth, J., Maritan, A., & Rinaldo, A. (2002). Modelling universality and scaling. Nature, 420, 626.