%0 Journal Article %A B. S. Kashin %T Some properties of orthogonal convergence system %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1977 %P 68-87 %V 143 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1977_143_a4/ %G ru %F TM_1977_143_a4