@article{DAN_1995_341_3_a0,
     author = {A. V. Abramyan and V. A. Nogin},
     title = {Fractional powers of second-order differential operators with},
     journal = {Doklady Akademii Nauk},
     pages = {295--298},
     publisher = {mathdoc},
     volume = {341},
     number = {3},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1995_341_3_a0/}
}