TY - JOUR AU - A. I. Lanin TI - 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 JO - Zapiski Nauchnykh Seminarov POMI PY - 1981 SP - 139 EP - 145 VL - 104 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZNSL_1981_104_a13/ LA - ru ID - ZNSL_1981_104_a13 ER -