@article{ZNSL_1968_9_a10,
     author = {N. S. Smirnova},
     title = {Calculation of the wave fields for multiple waves near the point of origin},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {212--240},
     publisher = {mathdoc},
     volume = {9},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1968_9_a10/}
}