@article{DAN_1973_211_3_a9,
     author = {A. V. Strauss},
     title = {On extensions of a semibounded operator},
     journal = {Doklady Akademii Nauk},
     pages = {543--546},
     publisher = {mathdoc},
     volume = {211},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_211_3_a9/}
}