• Desired trajectory generation of a quadrotor helicopter using hybrid control for enhanced situational awarenessAstrov, Igor; Pedai, Andrus; Rüstern, EnnuProceedings of the 2010 IEEE International Conference on Information and Automation : June 20-23, Harbin, China2010 / p. 1003-1007 : ill https://ieeexplore.ieee.org/document/5512295