@conference {BallhausRB:1992,
	title = {{Optimal Control of a Two-Link Flexible Manipulator Using Time-Varying Controller Gains: Initial Experiments}},
	booktitle = {Proceedings of the American Astronautical Society Guidance and Control Conference},
	year = {1992},
	month = {February},
	address = {Keystone, CO},
	author = {W. L. Ballhaus and Stephen M. Rock and A. E. Bryson Jr.}
}
