%0 Journal Article %T News and Notices %J Czechoslovak Mathematical Journal %D 1959 %P 634-636 %V 09 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1959.100388/ %R 10.21136/CMJ.1959.100388 %G en %F 10_21136_CMJ_1959_100388