%0 Journal Article %A A. P. Shostak %T $Q$-extensions of topological spaces and rings of functions %J Doklady Akademii Nauk %D 1976 %P 1291-1294 %V 226 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1976_226_6_a12/ %G ru %F DAN_1976_226_6_a12