Learning Decision Rules for scheduling Problems: A Classifier Hybrid Approach. - Mike R. Hilliard; Gunar E. Liepins; Gita Rangarajan; Mark R. Palmer (ML, 1989)

Alternatives for Classifier System Credit Assignment. - Gunar E. Liepins; Mike R. Hilliard; Mark R. Palmer; Gita Rangarajan (IJCAI, 1989)

Credit assignment and discovery in classifier systems. - Gunar E. Liepins; Mike R. Hilliard; Mark R. Palmer; Gita Rangarajan (Int. J. Intell. Syst., 1991)