Links
- http://ecologiaexplicada.blogspot.com/2009/10/charles-darwin-la-coevolucion-y-el.html
- http://weblogs.madrimasd.org/universo/archive/2008/12/08/108911.aspx
- http://books.google.com.co/books?id=5O1jpX-NoK8C&pg=PA39&dq=coevolucion#v=onepage&q=&f=false
- http://judiky.lacoctelera.net/post/2006/02/03/17-coevulucion
- http://books.google.com.co/books?id=oX9W9-a5gBEC&pg=PT89&dq=coevolucion#v=onepage&q=&f=false