@article{DAN_1975_221_5_a10,
     author = {M. N. Feller},
     title = {On the solvability of infinite-dimensional selfadjoint elliptic equations},
     journal = {Doklady Akademii Nauk},
     pages = {1046--1049},
     publisher = {mathdoc},
     volume = {221},
     number = {5},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_221_5_a10/}
}