@article{ZNSL_1981_104_a13,
     author = {A. I. Lanin},
     title = {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},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {139--145},
     publisher = {mathdoc},
     volume = {104},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1981_104_a13/}
}