1. T.P. Das, E.L. Hahn, Nuclear Quadrupole Resonance Spectroscopy (Academic Press, New York, 1958)
2. A. Abragam, The Principles of Nuclear Magnetism (Clarendon, Oxford, 1961)
3. A.I. Wertheimer, J. Norris, Res. Social Admin. Pharm. 5, 4–16 (2009)
4. Millions of counterfeit drugs seized in the EU, http://topnews.in/millions-counterfeit-drugs-seized-eu-299089
5. J.Barras, K. Althoefer, M.D. Rowe, I.J. Poplett, J.A.S. Smith, Appl. Magn. Reson., publ. online 22 March 2012