1. For the physical concepts we have mainly referred to B.I. Bleaney, B. Bleaney, Electricity and Magnetism, third ed., Oxford University Press, London, 1976; M.H. Levitt, Spin Dynamics: Basics of Nuclear Magnetic Resonance, second ed., Wiley, Chichester, 2008.
2. There are numerous books on FT-NMR. The reference book is: R.R. Ernst, G. Bodenhausen, A. Wokaun, Principles of Nuclear Magnetic Resonance in One and Two Dimensions, Oxford University Press, Oxford, 1987. We may also indicate: J. Keeler, Understanding NMR Spectroscopy, second ed., Wiley, Chichester, 2010; P.J. Hore, J.A. Jones, S. Wimperis, NMR: The Toolkit, second ed., Oxford University Press, Oxford, 2015.
3. Previous books on NMR of paramagnetic molecules are: G.N. La Mar, W.DeW. Horrocks, Jr., R.H. Holm (Eds.), NMR of Paramagnetic Molecules, Academic Press, New York, 1973. I. Bertini, C. Luchinat, NMR of Paramagnetic Molecules in Biological Systems, Benjamin-Cummings, Menlo Park, 1986; J. Kowalewski, L. Maler, Nuclear Spin Relaxation in Liquids: Theory, Experiments, and Applications, Taylor & Francis, New York, 2006.
4. The Anomalous Magnetic Moment of the Electron
5. �ber die magnetischen Momente der Atomkerne