%0 Journal Article %A V. G. Krasavin %A M. M. Popov %T Excitation coefficients of the whispering gallery waves in a vicinity of concave boundary with curvature vanishing at a point %J Zapiski Nauchnykh Seminarov POMI %D 1980 %P 138-145 %V 99 %U http://geodesic.mathdoc.fr/item/ZNSL_1980_99_a12/ %G ru %F ZNSL_1980_99_a12