1. A. Abragam, B. Bleaney, Electron Paramagnetic Resonance of Transition Ions (Oxford University Press, Oxford, 1970), 700 pp.
2. Handbuch der Physik;S. Metfessel,1968
3. J. Winter, Magnetic Resonance in Metals (Oxford University Press, New York, 1971), 206 pp.
4. A. Abragam, The Principles of Nuclear Magnetism (Clarendon Press, Oxford, 1994), 614 pp. Reprint edition
5. A.V. Komarov, C.M. Ryabchenko, O.B. Terletsky, I.I. Geru, R.D. Ivanchuk, J. Exp. Theor. Phys. 73(2(8)), 608–618 (1977). [Sov. Phys. JETP 46, 318–323 (1977), 1978 American Institute of Physics]