%0 Book %A Victor P. Shestopalov %A Youri V. Shestopalov %T Spectral Theory and Excitation of Open Structures %D 1996 %I Institution of Engineering and Technology %S Electromagnetic Waves %K local expansion theorem %K qualitative spectra characteristics %K diffraction gratings %K open waveguide resonators %K spectral theory %U https://digital-library.theiet.org/;jsessionid=yb8en7ykajlc.x-iet-live-01content/books/ew/pbew042e