@article{DAN_1986_289_1_a6,
     author = {O. V. Epifanov},
     title = {An infinite-order differential operator with constant coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {33--35},
     year = {1986},
     volume = {289},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_289_1_a6/}
}