1. and in Encyclopedia of Polymer Science and Engineering, 2nd Ed., Vol. 11, 48, and eds., John Wiley, New York (1988).
2. and in Encyclopedia of Polymer Science and Engineering, 2nd Ed., Vol. 12, 399, and eds., John Wiley, New York (1988).
3. and (to Dow Chemical Co.) U.S. Patent 3,239,582 (8 March 1966).
4. (to General Electric Co.) U.S. Patent 4,390,657 (28 June 1983).