@article{DAN_1976_226_2_a5,
     author = {A. V. Ostrovsky},
     title = {On nonseparable $\tau$ -- $A$-sets and their mappings},
     journal = {Doklady Akademii Nauk},
     pages = {269--272},
     publisher = {mathdoc},
     volume = {226},
     number = {2},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_226_2_a5/}
}