1. A.W. Overhauser, Phys. Rev. 92, 411 (1953)
2. T.R. Carver, C.P. Slichter, Phys. Rev. 92, 212 (1953)
3. A. Abragam, The Principles of Nuclear Magnetism (Clarendon, Oxford, 1961)
4. A.V. Kessenikh, V.I. Lushchikov, A.A. Manenkov, Y.V. Taran, Sov. Phys. Solid State 5, 321 (1963)
5. A.V. Kessenikh, A.A. Manenkov, G.I. Pyatnitskii, Sov. Phys. Solid State 6, 641 (1964)