http://www.invam.com
http://www.value-eng.org/
http://www.acvm.com.au/
http://www.leeds.ac.uk/civil/ceri/conman/value/vmnet.html
http://www.sjve.org/hp/english/menu.html
http://www.ivm.org.uk/
http://home.bre.polyu.edu.hk/~bsqpshen/hkivm.htm
http://www.scav-csva.org/CSVA.htm
http://www.rdg.ac.uk/~kcsgrest/value_management/