Challenges with Verification, Repeatability, and Meaningful Comparison in Genetic Programming: Gibson's Magic. - Jason M. Daida; Derrick S. Ampy; Michael Ratanasavetavadhana; Hsiaolei Li; Omar A. Chaudhri (GECCO, 1999)

What Makes a Problem GP-Hard? Validating a Hypothesis of Structural Causes. - Jason M. Daida; Hsiaolei Li; Ricky Tang; Adam M. Hilss (GECCO, 2003)