@article{DAN_1963_153_6_a1,
     author = {A. E. Gel'man},
     title = {Analytic solutions of a class of operator equations},
     journal = {Doklady Akademii Nauk},
     pages = {1234--1237},
     publisher = {mathdoc},
     volume = {153},
     number = {6},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_153_6_a1/}
}