@INPROCEEDINGS{HWT08,
  AUTHOR = {Gabriel M. Hoffmann and Steven L. Waslander and Claire J. Tomlin},
  TITLE = {Quadrotor Helicopter Trajectory Tracking Control},
  BOOKTITLE = {Proceedings of the AIAA Guidance, Navigation, and Control Conference},
  MONTH = {August},
  YEAR = {2008},
  ADDRESS = {Honolulu, HI},
  NOTE = {AIAA Paper Number 2008-7410},
}