1. Arendt, R.G., 1996. Conservation Design for Subdivisions: A Practical Guide for Creating Open Space Networks. American Planning Association, Chicago, IL.
2. Beatley, T., 2000. Green Urbanism: Learning from European Cities. In this classic comparison between American and European urban planning, Beatley lists the urban densities of representative American and European cities. Adjusting from units/acre to persons/hectare and assuming an average of 2.5 persons per unit: the former range between 7.8 units/ac (7.9 persons/ha) in Houston, Texas and 8.6 units/ac (8.7 persons/ha) in Phoenix, Arizona, to 15.8 units/ac (16.0 persons/ha) in New York City and 18.4 units/ac (18.6 persons/ha) in Los Angeles, compared to 23.5 units/ac (23.8 persons/ha) in Copenhagen, 34.8 units/ac (35.2 persons/ha) in London, 40.2 units/ac (40.7 persons/ha) in Zurich, 43.7 units/ac (44.2 persons/ha) in Stockholm and 56.2 units/ac (56.9 persons/ha) in Vienna.
3. Benedict, M., 2001. “Green Infrastructure: A Strategic Approach for Land Conservation Planning” at National Conservation Training Center Conference, May 1–3, Shepherdstown, Virginia, quote on pp. 7–8.
4. Benedict, M., McMahon, E.T., 2002a. Green Infrastructure: Smart Conservation for the 21st Century, 2002a, 1st quote on p. 6; 2nd quote on p. 14.
5. Benedict, M., McMahon, E.T., 2002b. “Green Infrastructure: Smart Conservation for the 21st Century” in Renewable Resources Journal, Autumn, p. 13.