Harmuth, H. F., Barrett, T. W., & Meffert, B. (2001). Modified Maxwell equations in quantum electrodynamics. World Scientific.

Harmuth, Henning F., T. W. Barrett, and Beate Meffert. Modified Maxwell Equations in Quantum Electrodynamics. River Edge, N.J.: World Scientific, 2001.

Harmuth, Henning F., et al. Modified Maxwell Equations in Quantum Electrodynamics. World Scientific, 2001.