@article{DAN_1958_121_4_a5,
     author = {V. I. Protasov},
     title = {On linear partial differential equations of infinite order with constant coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {594--597},
     publisher = {mathdoc},
     volume = {121},
     number = {4},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_121_4_a5/}
}