@article{IVM_1969_3_a8,
     author = {V. Ya. Stam},
     title = {A~certain class of linear differential operators of infinite order},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {66--71},
     publisher = {mathdoc},
     number = {3},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1969_3_a8/}
}