1. Vold, R. R. and Vold, R. L., Adv. Magn. Opt. Reson. 16, 85 (1991).
2. Spiess, H. W., Adv. Polymer Sci. 66, 24 (1985).
3. Smith, R. L. and Oldfield, E., Science 255, 280 (1984).
4. Keniry, M. A., Methods Enzymol. 176, 376 (1989).
5. Vold, R. R., in NMR in Liquid Crystals, J. W. Emsley, Ed. (Reidel, Dordrecht, 1985) p. 253.