@article{DAN_1982_267_2_a1,
     author = {Yu. S. Barkovskii},
     title = {Hypooscillatory and hyperoscillatory differential operators},
     journal = {Doklady Akademii Nauk},
     pages = {269--271},
     publisher = {mathdoc},
     volume = {267},
     number = {2},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1982_267_2_a1/}
}