1. Hallock, J.N., ed. Proceedings of the Aircraft Wake Vortex Conference, Vols I and II. October29–311991, Washington, DC.
2. Laser-Doppler system for detection of aircraft trailing vortices
3. Koepp, F. Proceeding of the Aircraft Wake Vortex Conference Volume II. October29–311991, Washington, DC. Edited by: Hallock, J.N. Springfield, VA: National Technical Information Service. 46-1.
4. Page, R.D., Clawson, K.L., Garodz, L.J. and Rudis, R.P. Proceedings of the Aircraft Wake Vortex Conference Volume II. October29–311991, Washington, DC. Edited by: Hallock, J.N. Springfield, VA: National Technical Information Service. 49-1.