%0 Journal Article %A Yu. V. Shestopalov %T Sufficient conditions for the existence of a discrete spectrum of natural waves of slot transmission lines %J Doklady Akademii Nauk %D 1982 %P 1131-1135 %V 264 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1982_264_5_a28/ %G ru %F DAN_1982_264_5_a28