@article{DE_1992_28_3_a12,
     author = {I. A. Kipriyanov and Yu. V. Zasorin},
     title = {Fundamental solution of the wave equation with several singularities and the {Huygens} principle},
     journal = {Differencialʹnye uravneni\^a},
     pages = {452--462},
     publisher = {mathdoc},
     volume = {28},
     number = {3},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_3_a12/}
}