1. Spin echoes;Hahn;Phys. Rev.,1950
2. The Principles of Nuclear Magnetism;Abragam,1961
3. E. Fukushima, S.B.W. Roeder, Experimental pulse NMR: a nuts and bolts approach (Addison-Wesley Pub. Co., Advanced Book Program, Reading, Mass., 1981).
4. Principles of Magnetic resonance, With Examples from Solid State Physics;Slichter,1963
5. For a discussion see, R. W. Damon, Ferromagnetic Resonance at High Power, in Magnetism, edited by G. T. Rado and H. Suhl (Academic Press, New York, 1963), Vol. 1, Chap. 11, pp. 552–620.