1. 20th Annual Technical Conference;GK Schmitz,1965
2. Owens-Corning Fiberglas, Publication No. 5-CR-6516, 1974.
3. PPG Industries, Bulletins F-131A, F-132B, Hybon 2000 Series.
4. Goldsworthy Engineering, USAAMRDL-TR-76–5, 1976.
5. Whisenhunt, F. S., Jr., NRL 6161, 1964.