1. Abragam, A., 1961, The Principles of Nuclear Magnetism, Clarendon Press, Oxford.
2. Abragam, A., 1962, In Topics in Radiofrequency Spectroscopy, Proceeedings of the International School of Physics «Enrico Fermi», XVII Course (A. Gozzini, ed.), Academic Press, New York. p281.
3. Abragam, A., and Bleaney, B., 1970, Electron Paramagnetic Resonance of Transition Ions, Clarendon Press, Oxford.
4. Abrie, P.L.D., 1985, The Design of Impedance-Matching Networks for Radio-frequency and Microwave Amplifiers Artech House, Norwood.
5. Alger, R.S., 1968, Electron Paramagnetic Resonance: Techniques and Applications, Interscience, New York.