1. T.F. Comfort and D. Elrick, RK-TR-72-5, April 1972.
2. M.T. Cucksee and H.C. Allen, RK-75-8, June 1975.
3. S.P. McManus, H.S. Bruner and H.D. Coble, UAH-RR-140, April 1973.
4. N. Johnson, C. Gotzmer and M. Graff, NSWC-TR-80-275, November 1980.
5. A.T. Nielsen, W.P. Norris and R.A. Henry, NWC-TP-5688, October 1974.