@article{ZNSL_1979_89_a20,
     author = {A. S. Starkov},
     title = {Asymptotic solution of a~two scales problem of wave-propagation with a~local degeneration point},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {275--285},
     publisher = {mathdoc},
     volume = {89},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1979_89_a20/}
}