1. R. Becker, Theorie der Elektrizität, 6th ed., especially volume II, Teubner, Leipzig, 1933.
2. C. J. F. Böttcher, Theory of Electric Polarization, Elsevier, Amsterdam, 1952.
3. W. Fuller Brown jr., Encyclopedia of Physics, 27, Springer, Berlin, 1956, pp. 1–154.
4. P. Debye, Polar Molecules, Dover, New York, 1945.
5. Dielectrics discussion, Trans. Faraday Soc. 42A,(1946).