1. Ahern, J. 1995. Greenways as a planning strategy. In: Greenways: The Beginning of an International Movement, pp. 131–155. J.G. Fabos and J. Ahern (eds.). Elsevier, Amsterdam.
2. Ahern, J., and K. Kerkstra. 1994. Time space ecology and design: landscape aesthetics in an ecological framework. In: Proceedings of the ASLA Symposium on Ecology, Aesthetics and Design, October 1994, San Antonio, TX.
3. Alexander, C., S. Ishikawa, and M. Silverstein. 1977. A Pattern Language. Oxford University Press, New York.
4. Allen, A.W. 1986. Habitat Suitability Index Models: Mink. Habitat Procedures Group. National Ecology Center, U.S. Fish and Wildlife Service. Biological Report 82, November. Washington DC.
5. Bent, A.C. 1992. Life Histories of Northern Woodpeckers. Indiana University Press, Bloomington and Indianapolis, IN.