@article{ZNSL_1981_104_a18,
     author = {M. M. Popov},
     title = {New method of computation of wave fields in high frequency approximation},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {195--216},
     publisher = {mathdoc},
     volume = {104},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1981_104_a18/}
}