@article{RM_1960_15_4_a15,
     author = {D. F. Kharazov},
     title = {Some unbounded symmetrizable operators in {Hilbert} spaces},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {15},
     number = {4},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1960_15_4_a15/}
}