1. Atherton NM. Electron Spin Resonance Theory and Applications. New York: John Wiley & Sons Inc.; 1993
2. Weil JA, Bolton JR, Wertz JE. Electron Paramagnetic Resonance Elementary Theory and Practical Applications. New York: John Wiley & Sons Inc.; 1994
3. Gordy W. Theory and Applications of Electron Spin Resonance. New York: John Wiley & Sons Inc.; 1980
4. Symons M. Chemical and Biochemical Aspects of Electron-Spin Resonance Spectroscopy. New York: Van Nostrand Reinhold Company; 1978
5. Bersohn M, Baird JC. An Introduction to Electron Paramagnetic Resonance. New York: W.A. Benjamin, Inc.; 1966