@article{MZM_1979_25_3_a9,
     author = {M. N. Feller},
     title = {Solvability of infinite-dimensional elliptic equations with variable coefficients},
     journal = {Matemati\v{c}eskie zametki},
     pages = {419--424},
     publisher = {mathdoc},
     volume = {25},
     number = {3},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1979_25_3_a9/}
}