@article{DAN_1962_142_4_a16,
     author = {P. E. Sobolevskii},
     title = {Green's functions of arbitrary (in particular, integer) powers of elliptic operators},
     journal = {Doklady Akademii Nauk},
     pages = {804--807},
     publisher = {mathdoc},
     volume = {142},
     number = {4},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_142_4_a16/}
}