1. Cohen M.H., Reif F. in: Solid State Physics: Advances in Research and Applications (Seitz F., Turnbull D., eds.), vol. 5, pp. 321–438. New York: Academic Press 1957.
2. Abragam A.: The Principles of Nuclear Magnetism, ch.6 and 7. New York: Oxford University Press 1983.
3. Schramm S., Oldfield E.: J. Chem. Soc., Chem. Commun.1982, 980–981.
4. Ganapathy S., Schramm S., Oldfield E.: J. Chem. Phys.77, 4360–4365 (1982)
5. Kunwar A.C., Thompson A.R., Gutowsky H.S., Oldfield E.: J. Magn. Reson.60, 467–472 (1984)