%0 Journal Article %A V. Fedorchuk %T $\theta$-proximities and $\theta$-absolutes %J Doklady Akademii Nauk %D 1968 %P 546-549 %V 180 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1968_180_3_a7/ %G ru %F DAN_1968_180_3_a7