%0 Journal Article %A A. I. Lanin %T Comparison Kirchhoff's method and the method of parabolic equation in the whispering gallery waves problem in a~vicinity of flex point: of the boundary %J Zapiski Nauchnykh Seminarov POMI %D 1981 %P 139-145 %V 104 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1981_104_a13/ %G ru %F ZNSL_1981_104_a13