1. F. W. Billmeyer, ?Textbook of Polymer Science? (Wiley, New York, 1962) Ch. 4, p. 88.
2. M. P. Stevens, ?Characterisation and Analysis of Polymers by Gas Chromatography? (Marcel Dekker, New York, 1969).
3. I. C. NcNeill,Eur Polymer J. 4 (1968) 21.
4. F. A. Lehmann andG. M. Brauer,J. Dent. Res. 39 (1960) 759.
5. J. Strassburger, G. M. Brauer, M. Tryon andA. F. Forziati,Dent. Abs. 6 (1961) 185.