@article{SM_1972_18_3_a5,
     author = {Yu. N. Frolov},
     title = {On a~method of solution of an operator equation of infinite order},
     journal = {Sbornik. Mathematics},
     pages = {473--485},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {1972},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1972_18_3_a5/}
}