1.
Weil, John A., Bolton, James R. Electron paramagnetic resonance: elementary theory and practical applications [Internet]. 2nd ed. Hoboken, N.J.: Wiley-Interscience; 2007. Available from: http://encore.lib.warwick.ac.uk/iii/encore/record/C__Rb2513084
2.
Levitt MH. Spin dynamics: basics of nuclear magnetic resonance [Internet]. 2nd ed. Chichester, England: John Wiley & Sons; 2008. Available from: http://encore.lib.warwick.ac.uk/iii/encore/record/C__Rb2534080