1. Thidé, B. (2011) Electromagnetic Field Theory. 2nd Edition, Swedish Institute of Space Physics, Uppsala.
https://web.archive.org/web/20160601102148/http://www.physics.irfu.se/CED/Book/EMFT_Book.pdf
2. Finzi, B. (1959) Meccanica Razionale. 3rd Edition, Zanichelli, Bologna.
3. V Photon Wave Function
4. Complex Representation Theory of the Electromagnetic Field
5. VIII. A dynamical theory of the electromagnetic field