Brosl Hasslacher and Mark W. Tilden (1995). "Living machines". Robotics and Autonomous Systems. 15 (1–2). Elsevier BV: 143–169. doi:10.1016/0921-8890(95)00019-c.
Adam Harris and James M. Conrad (2010). Hybrid control of a simple walking autonomous robot. Proceedings of the IEEE SoutheastCon 2010 (SoutheastCon). IEEE. doi:10.1109/secon.2010.5453839.
