1.Introduced Species locally in Metchosin

2. Damion Wilson's reference:
http://www.arts.monash.edu.au/ges/who/haberle/JFernandez/JFernandez.html

3. Jaffar's references:
This page describes the consequences of introducing alien species into the U.S http://www.gcrio.org/CONSEQUENCES/vol2no2/article2.html

4.The economical impact of introduced species in the U.S.
http://www.rbg.ca/cbcn/en/news/press_cost.html
5.A library of links about introduces species
http://www-bml.ucdavis.edu/library/introspe.htm
.