1. U.S. Patent 4,632,309 (1986).
2. Textbook of Polymer Science, p. 120. Wiley, New York (1971).
3. in Thermoplastic Elastomers, ch 10A, p. 231, and eds., Hanser (1987).
4. in Thermoplastic Elastomers, ch 9B, p. 215, and eds., Hanser (1987).
5. U.S. Patent 4,394,498 (1983).