1. Report of the RTCA Board of Director's Select Committee on Free Flight;RTCA, Inc.,1994
2. Conflict Detection and Resolution for Free Flight;Krozel;Air Traffic Control Quarterly Journal, Special Issue on Free Flight,1997
3. Optimum Horizontal Guidance Techniques for Aircraft;Erzberger;Journal of Aircraft,1971
4. Trajectory Synthesis for Air Traffic Automation;Slattery;Journal of Guidance, Control, and Dynamics,1997
5. Near-Optimal Horizontal Trajectories for Autonomous Air Vehicles;Shapiro;Journal of Guidance, Control, and Dynamics,1997