1. Woolfson MM (1970) An Introduction to X-ray Crystallography. Cambridge University Press, Cambridge
2. Rameseshan S, Abrahams SC (1974) Anomalous Scattering. Munksgaard, Copenhagen
3. Stuhrmann HB (1985) Adv. Polym. Sci. 67: 123
4. Lerr Del Grande N, Oliver AJ (1981) UCRL — 85683 Preprint
5. Lye C, Phillips JC, Kaplan D, Doniach S, Hodgson KO (1980) Proc. Natl. Acad. Sci. USA 77: 5884