4Amati M,Yokohari M. Temporal changes and local variations in the functions of London's green belt[J].Landscape and Urban Planning,2006,(1/2):125-142.doi:10.1016/j.landurbplan.2004.12.007.
5Whyte W H. The last landscape[M].New York:A Double day Anchor Book,1968.
6Department for Communities and Local Government. Planning policy guidance 2:Green belts[OL].http://www.communities.goy.uk:London,2006.