%0 Journal Article %A Gerlach, Eberhard %T On the characterization of weak closure in Hilbert space %J Czechoslovak Mathematical Journal %D 1972 %P 368-372 %V 22 %N 3 %I mathdoc %U https://geodesic-test.mathdoc.fr/articles/10.21136/CMJ.1972.101108/ %R 10.21136/CMJ.1972.101108 %G en %F 10_21136_CMJ_1972_101108