%0 Journal Article %A S. G. Ovsepyan %T Construction of all Hausdorff and all $H$-closed extensions of topological spaces %J Doklady Akademii Nauk %D 1975 %P 764-767 %V 224 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1975_224_4_a5/ %G ru %F DAN_1975_224_4_a5