@article{IM2_1967_1_5_a2,
     author = {Yu. P. Krasovskii},
     title = {Isolation of singularities of the {Green's} function},
     journal = {Izvestiya. Mathematics },
     pages = {935--966},
     publisher = {mathdoc},
     volume = {1},
     number = {5},
     year = {1967},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1967_1_5_a2/}
}