%0 Journal Article %A Ha Huy Bang %A Yu. F. Korobeinik %T The applicability of composite differential operators to some classes of exponential functions %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1982 %P 83-85 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1982_7_a16/ %G ru %F IVM_1982_7_a16