%0 Journal Article %T News and Notices %J Czechoslovak Mathematical Journal %D 1967 %P 469-470 %V 17 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1967.100792/ %R 10.21136/CMJ.1967.100792 %G en %F 10_21136_CMJ_1967_100792