Glossary of Ecology (6th ed.) by Krebs (2009)
- model of population growth described by a symmetrical S-shaped curve with an upper asymptote.
Glossary of "Environmental Science: Earth as a Living Planet (2nd ed.)" by Botkin & Keller (1998)
- The equation that results in a logistic growth curve, that is, the growth rate dN/dt = rN[(K-N)/N], where r is the intrinsic rate of increase, K is the carrying capacity, and N is the population size.
- Botkin, D. B. & Keller, E. A. 1998. Environmental Science: Earth as a Living Planet, 2nd ed. -xxxxii + 649 pp. John Wiley & Sons, Inc., New York.
- Krebs, C. J. 2009. Ecology, 6th ed. -xvi + 655 pp. Pearson Benjamin Cummings, San Francisco.