Is It Alive or Is It GA? - Thomas S. Ray (ICGA, 1991)

An Evolutionary Approach to Synthetic Biology: Zen and the Art of Creating Life. - Thomas S. Ray (Artif. Life, 1994)

An Evolutionary Approach to Program Transformation and Synthesis. - Sung-Bae Cho; Thomas S. Ray (Int. J. Softw. Eng. Knowl. Eng., 1995)

Evolving Parallel Computation. - Kurt H. Thearling; Thomas S. Ray (Complex Syst., 1996)

Evolving complexity. - Thomas S. Ray (Artif. Life Robotics, 1997)

Selecting naturally for differentiation: Preliminary evolutionary results. - Thomas S. Ray (Complex., 1998)

Evolution of differentiated multi-threaded digital organisms. - Thomas S. Ray; Joseph F. Hart (IROS, 1999)

Open Problems in Artificial Life. - Mark A. Bedau; John S. McCaskill; Norman H. Packard; Steen Rasmussen; Christoph Adami; David G. Green; Takashi Ikegami; Kunihiko Kaneko; Thomas S. Ray (Artif. Life, 2000)

Evolution of New Tissues thruogh Gene Duplication and Divergence In Multihreaded Digital Organisms. - Joseph F. Hart; Thomas S. Ray; Katsunori Shimohara (ICME, 2001)

Measures of evolvability in Tierra. - Thomas S. Ray; Chenmei Xu (Artif. Life Robotics, 2001)

Evolutionary design, robustness and of sidewinding locomotion of simulated libmless wheelless robot [libmless read limbless]. - Ivan Tanev; Thomas S. Ray; Andrzej Buller (IEEE Congress on Evolutionary Computation, 2004)

Evolution, Robustness, and Adaptation of Sidewinding Locomotion of Simulated Snake-Like Robot. - Ivan Tanev; Thomas S. Ray; Andrzej Buller (GECCO (1), 2004)

Evolution of side-winding locomotion of simulated limbless, wheelless robots. - Ivan Tanev; Thomas S. Ray (Artif. Life Robotics, 2005)

Automated Evolutionary Design, Robustness, and Adaptation of Sidewinding Locomotion of a Simulated Snake-Like Robot. - Ivan Tanev; Thomas S. Ray; Andrzej Buller (IEEE Trans. Robotics, 2005)

Life's Solution: Inevitable Humans in a Lonely Universe. - Thomas S. Ray (Artif. Life, 2006)

Maintenance of Species Diversity by Predation in the Tierra System. - Jie Shao; Thomas S. Ray (ALIFE, 2010)

Evolving a Team of Asymmetric Predator Agents That Do Not Compute in Predator-Prey Pursuit Problem. - Ivan Tanev; Milen Georgiev; Katsunori Shimohara; Thomas S. Ray (AIMSA, 2018)

Evolution, Robustness and Generality of a Team of Simple Agents with Asymmetric Morphology in Predator-Prey Pursuit Problem. - Milen Georgiev; Ivan Tanev; Katsunori Shimohara; Thomas S. Ray (Inf., 2019)

The Surprising Creativity of Digital Evolution: A Collection of Anecdotes from the Evolutionary Computation and Artificial Life Research Communities. - Joel Lehman; Jeff Clune; Dusan Misevic; Christoph Adami; Lee Altenberg; Julie Beaulieu; Peter J. Bentley; Samuel Bernard; Guillaume Beslon; David M. Bryson; Nick Cheney; Patryk Chrabaszcz; et al. (Artif. Life, 2020)