1. Very instructive treatments regarding eddy current losses and associated phase shifts can be found in K.L. Scott, Proc. lnst. Radio Engineers 18.10 (1930): 1750.
2. Rigorous classic treatments on eddy currents can be found in references quoted by R.M. Borzorth, Ferromagnetism. Princeton: D. Van Nostrand Co., Inc., 1951:490,769.
3. R.A. Hein and R.L. Falge, Phys. Rev. 123.2 (1961): 407.
4. E. Maxwell and Myron Strongin, Phys. Rev. Lett. 10.6 (1963): 212.
5. C.P. Bean, Rev. Mod. Phys. 36 (1964): 31.