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Spectral theory of guided waves
by
A. S. Zilʹbergleĭt
Institute of Physics Pub., 1996
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Spektralʹnai͡a︡ teorii͡a︡ reguli͡a︡rnykh volnovodov
by
A. S. Zilʹbergleĭt
Akademii͡a︡ nauk SSSR, Fiziko-tekhn. in-t im. A.F. Ioffe, 1983
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