@article{FAA_1984_18_1_a7,
     author = {T. Ya. Azizov},
     title = {Extensions of $J$-isometric and $J$-symmetric operators},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {57--58},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1984_18_1_a7/}
}