* - "Adaptive robotic nervous systems and control circuits therefor" - Tilden's patent; A self-stabilizing control circuit utilizing pulse delay circuits for controlling the limbs of a limbed robot, and a robot incorporating such a circuit; artificial "neurons".
* — "Adaptive robotic nervous systems and control circuits therefor" — Tilden’s patent; A self-stabilizing control circuit utilizing pulse delay circuits for controlling the limbs of a limbed robot, and a robot incorporating such a circuit; artificial «neurons».