1. For older work, see P. H. Geil, ?Polymer Single Crystals?, (Interscience Publ., J. Wiley & Sons, New York, 1963) pp. 421?490.
2. E. W. Fischer and G. F. Schmidt, Angew. Chem. 74 (1962) 551.
3. A. Peterlin, J. Polymer Sci. C9 (1965) 61; C15 (1967) 427; C18 (1967) 123.
4. I. L. Hay and A. Keller, Kolloid-Z. & Z. Polymere 204 (1965) 43.
5. R. S. Stein, Proc. R. A. Welch Foundation Conf.Chem. Res. 10: Polymers, (1967) 207.