Brau, C. Free-Electron Generators of Coherent Radiation. SPIE Digital Library.
Tohutoru Kātū Chicago (17th ed.)Brau, Charles. Free-Electron Generators of Coherent Radiation. SPIE Digital Library.
Tohutoro MLA (9th ed.)Brau, Charles. Free-Electron Generators of Coherent Radiation. SPIE Digital Library.
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