Simulations, Realizations, and Theories of Life. - Howard H. Pattee (ALIFE, 1987)

Artificial Life Needs a Real Epistemology. - Howard H. Pattee (ECAL, 1995)

Evolved Open-Endedness, Not Open-Ended Evolution. - Howard H. Pattee; Hiroki Sayama (Artif. Life, 2019)