@article{DAN_1969_184_3_a1,
     author = {Yu. N. Vladimirskii},
     title = {$\Phi$_-operators in locally convex spaces},
     journal = {Doklady Akademii Nauk},
     pages = {514--517},
     year = {1969},
     volume = {184},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_184_3_a1/}
}