@article{ZNSL_1978_78_a14,
     author = {M. M. Popov and I. Pshenchik},
     title = {Whispering gallery waves in a neighborhood of a flat point of a concave boundary},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {203--210},
     publisher = {mathdoc},
     volume = {78},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1978_78_a14/}
}