@article{Billard_et_al04,
author = "Billard, A. and Epars, Y. and Calinon, S. and Cheng, G.
and Schaal, S.",
title = "Discovering Optimal Imitation Strategies",
journal = "Robotics and Autonomous Systems",
year = "2004",
volume="47",
number="2-3",
pages="69--77"
}