1. A. Abragam, Principles Nuclear Magnetism, Oxford Univ. Press (1961).
2. M. Goldman, Spin Temperature and Nuclear Magnetic Resonance in Solids, Oxford Univ. Press (1970).
3. V. O. Zavel'skii and É. I. Fedin, ?Experimental studies on the form of NMR line in solids,? Zh. Strukt. Khim., 14, No. 1, 58?64 (1973).
4. A. A. Lundin and B. N. Provotorov, ?On the statistical theory of the form of the nuclear magnetic resonance line,? Zh. Eksp. Teor. Fiz., 70, No. 6, 2201?2210 (1976).
5. K. Bergman, ?Study of molecular motions of polyethylene by line-shape analysis of broadline proton NMR spectra,? J. Polymer Sci. Polymer Phys. Ed. 16, No. 9, 1611?1634 (1978).