1. N. J. Oppenheimer and T. L. James, eds., this series, Vols. 176 and 177.
2. J. L. Markley, this series, Vol. 176, p. 12.
3. J. Jeener, Ampére International Summer School, Basko Polje, Yugoslavia (1971).
4. Principles of Nuclear Magnetic Resonance in One and Two Dimensions;Ernst,1987