2[1]Porter Douglas R. Transit - focused Development: A Synthesis of Research and Experience. Transit Cooperative Research Progran Report 20. Washington, DC: Transportation Research Board, 1998
3[2]Calthorpe Peter, The Next American Metropolis: Ecology, Community, and the American Dream. New York: Princeton Architectural Press, 1993
4BERRY B J L,GOHEEN P J,GOLDSTEIN H.Metropolitan Area Def-inition:A Reevaluation of Concept and Statistical Practice[M].Washington DC:US Bureau of the Census,1968.
