Created by W.Langdon from gp-bibliography.bib Revision:1.8620
http://www.pitt.edu/~jduffy/docs/Usr.pdf",
http://www.pitt.edu/~jduffy/docs/Usr.ps",
http://citeseer.ist.psu.edu/304022.html",
https://ideas.repec.org/p/sce/scecf9/1033.html",
CEF'99 See also \cite{duffy:1999:srised} http://fmwww.bc.edu/cef99/sess/chen.cfp.html",
Genetic Programming entries for John Duffy Jim Engle-Warnick