1. University of Idaho, college of Natural Resources,
http://www.cnr.uidaho.edu/veg_measure/Modules/Lessons/Module%207/7_2_Biodiversity.htm
2. Gurevitch, J., Scheiner, S.M., Fox, G.A.: The Ecology of Plants, 2nd edn. Sinauer Associates, Inc., Sunderland (2006)
3. Gaston, K.J.: Species richness: Measure and measurement. In: Gaston, K.J. (ed.) Biodiversity, a Biology of Numbers and Difference, vol. 396, pp. 77–113. Blackwell Science, Cambridge (1996)
4. Escalante, T., et al.: Ecological niche models and patterns of richness and endemism of the southern Andean genus Eurymetopum (Coleoptera, Cleridae). Rev. Bras. Entomol. 53(3), 379–385 (2009)
5. The OpenNLP Maxent Homepage,
http://maxent.sourceforge.net/