Stably extending two-dimensional bipedal walking to three dimensions. Ames, A. D & Gregg, R. D In American Control Conference, 2007. ACC'07, pages 2848–2854, 2007. IEEE.
Paper bibtex @inproceedings{ames2007stably,
title={Stably extending two-dimensional bipedal walking to three dimensions},
author={Ames, Aaron D and Gregg, Robert D},
booktitle={American Control Conference, 2007. ACC'07},
pages={2848--2854},
year={2007},
organization={IEEE},
url = {http://ames.caltech.edu/ACC2007.pdf}
}