@misc{indiciae38de76f1f116, title = {Optimal Variable-Structure Control Tracking of Spacecraft Maneuvers}, author = {John L. Crassidis and Srinivas R. Vadali and F. Landis Markley}, year = {1999}, url = {https://ntrs.nasa.gov/citations/19990064175}, note = {Source identifier: 19990064175} }