K. Jones, S. Duggan, and M. Platzer. 39th Aerospace Sciences Meeting & Exhibit, Reno, US-NV, American Institute of Aeronautics and Astronautics, (January 2001)
T. Mueller. RTO Applied Vehicle Panel Special Course on Development and Operation of UAVs for Military and Civil Applications, Saint-Genèse, BE, NATO Research and Technology Organisation, (September 1999)