http://www.fukuoka.unhabitat.org/out/siryo/r05.html
http://www.econturk.org/Turkiyeekonomisi/erdal1.pdf
http://www.citymayors.com/society/urban-crime-07.html
http://www.nationalschool.gov.uk/policyhub/docs/sgibbons_18mar04.pdf
http://townline.wordpress.com/2007/11/02/urban-crime-its-causes-and-control-by-william-a-stanmeyer-imprimis-november-1972/
http://ww2.unhabitat.org/programmes/safercities/facts.asp
http://www.unhabitat.org/downloads/docs/5615_13762_2466_alt.pdf
http://www.unhabitat.org/

http://www.wolfson.ox.ac.uk/~ben/cd_act.pdf
http://www.harvardir.org/articles/1432/1/
http://law.jrank.org/pages/2227/Urban-Crime.html