@article{DAN_1967_176_3_a6,
     author = {E. A. Larionov},
     title = {The extension of dual subspaces},
     journal = {Doklady Akademii Nauk},
     pages = {515--517},
     publisher = {mathdoc},
     volume = {176},
     number = {3},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_176_3_a6/}
}