%0 Journal Article %A S. N. Slugin %T Monotonic processes of two-sided approximations in a partially ordered convergence group %J Doklady Akademii Nauk %D 1962 %P 34-37 %V 147 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1962_147_1_a7/ %G ru %F DAN_1962_147_1_a7