@article{DAN_1974_214_1_a13,
     author = {M. N. Feller},
     title = {On the solvability of infinite-dimensional elliptic equations with constant coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {59--62},
     year = {1974},
     volume = {214},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_214_1_a13/}
}