1. : Glasfaserverst�rkte Kunststoffe. Springer-Verlag, Berlin 1967, p. 181.
2. and : High-Temperatur Materials and Technology. Wiley, New York 1967, pp. 256ff.
3. : Werkstoffe der chemischen Technik, Vol. 3. Verlag Sauerl�nder, Aarau 1955, p. 76.
4. and : Ceramic Fibers and Fibrous Composite Materials. Academic Press, New York 1968.
5. : Advanced Materials. Chemical Publishing, New York 1969.