@article{DAN_1967_175_2_a7,
     author = {P. Kenderov},
     title = {On $Q$-spaces},
     journal = {Doklady Akademii Nauk},
     pages = {288--291},
     publisher = {mathdoc},
     volume = {175},
     number = {2},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_175_2_a7/}
}