@article{DE_1972_8_5_a25,
     author = {G. N. Yakovlev},
     title = {Solution of second order elliptic equations in weight spaces},
     journal = {Differencialʹnye uravneni\^a},
     pages = {928--930},
     publisher = {mathdoc},
     volume = {8},
     number = {5},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_5_a25/}
}