Evolving cognitive scaffolding and environment adaptation: a new research direction for evolutionary robotics. - Tom Ziemke; Nicklas Bergfeldt; Gunnar Búason; Tarja Susi; Henrik Svensson (Connect. Sci., 2004)

Brains, Bodies, and Beyond: Competitive Co-Evolution of Robot Controllers, Morphologies and Environments. - Gunnar Búason; Nicklas Bergfeldt; Tom Ziemke (Genet. Program. Evolvable Mach., 2005)

Evolution of Tool Use Behavior. - Boris Schäfer; Nicklas Bergfeldt; María José Riveiro Carballa; Tom Ziemke (ALIFE, 2007)