1. Allen, T.F.H., Starr, T.B., 1982. Hierarchy: Perspectives for Ecological Complexity. University of Chicago Press, Chicago, IL.
2. Andreasen, J.K., Noss, R., Slosser, N.C., 1999. Development of a terrestrial index of ecological integrity: a new tool for ecosystem management. World Conf. Ecosyst. Health, in press.
3. The natural imperative for biological conservation;Angermeier;Conserv. Biol.,2000
4. Barbour, M.T., Stribling, J.B., Karr, J.R., 1995. Multimetric approach for establishing biocriteria and measuring biological condition. In: Davis, W.S., Simon, T.P. (Eds.), Biological Assessment and Criteria: Tools for Water Resource Planning and Decision Making. Lewis Publishers, London, pp. 63–77.
5. Land use and avian species diversity along an urban gradient;Blair;Ecol. Appl.,1996