1. Ergun, S. and E.H. Bean, “Magnetic Separation of Pyrite from Coals," Bureau of Mines Report of investigations 7181” September 1968.
2. Marusak, L.A., P.L. Walker, Jr., and L.N. Mulay, “The Magnetokinetics of Oxidation of Pyrite,” IEEE Trans, on Magnetics, MAG-15, No. 6, November 1976.
3. Stratton, J.A. “Electromagnetic Theory,” pp. 205–206, McGraw-Hill, New York, New York, 1973.
4. Landau, L.D. and E.M. Lifshitz, “Electrodynamics of Continuous Media,” p. 43, Addison-Wesley, Reading, Massachusetts, 1960.
5. Boucher, C.J.F. “Theory of Electric Polarization,” p. 52, Elsevier, New York, 1952.