Brau, C. Free-Electron Generators of Coherent Radiation. SPIE Digital Library.
Cita Chicago (17th ed.)Brau, Charles. Free-Electron Generators of Coherent Radiation. SPIE Digital Library.
Cita MLA (8th ed.)Brau, Charles. Free-Electron Generators of Coherent Radiation. SPIE Digital Library.
Atenció: Aquestes cites poden no estar 100% correctes.