1. The human context;Moos,1976
2. The behavioral determinants of exercise;Sherwood;Annu Rev Nutr,2000
3. Ecological models;Sallis,1997
4. Centers for Disease Control and Prevention. Active community environments. 2002. Available at: www.cdc.gov/nccdphp/dnpa/aces.htm. Accessed June 1, 2002.
5. Impacts of mixed use and density on utilization of three modes of travel;Frank;Transportation Res Record,1994