Ripple Crossover in Genetic Programming. - Maarten Keijzer; Conor Ryan; Michael O'Neill 001; Mike Cattolico; Vladan Babovic (EuroGP, 2001)

Crossover in Grammatical Evolution: The Search Continues. - Michael O'Neill 001; Conor Ryan; Maarten Keijzer; Mike Cattolico (EuroGP, 2001)

Grammatical Evolution Rules: The Mod and the Bucket Rule. - Maarten Keijzer; Michael O'Neill 001; Conor Ryan; Mike Cattolico (EuroGP, 2002)

Crossover in Grammatical Evolution. - Michael O'Neill 001; Conor Ryan; Maarten Keijzer; Mike Cattolico (Genet. Program. Evolvable Mach., 2003)

Run Transferable Libraries - Learning Functional Bias in Problem Domains. - Maarten Keijzer; Conor Ryan; Mike Cattolico (GECCO (2), 2004)

Undirected Training of Run Transferable Libraries. - Maarten Keijzer; Conor Ryan; Gearoid Murphy; Mike Cattolico (EuroGP, 2005)