8Escobedo F J, Nowak D J, Wagner J E, et al. The socioeconomics and management of Santiago de Chile's public urban forests [ J ]. Urban Forestry and Urban Greening,2006,4 (3/4) : 105 - 114.
9Nowak D J, Crame D E, Steveers J C. Air pollution removal by urban trees and shrubs in the United States [J]. Urban Forestry and Urban Greening,2006,4(3/4) :115 - 123.
10Byrd W. A Century of planting design[ J]. Landscape Architecture, 1999,(11) :92 -119.
