%0 Journal Article %T News and Notices %J Czechoslovak Mathematical Journal %D 1969 %P 190-191 %V 19 %N 1 %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1969.100886/ %R 10.21136/CMJ.1969.100886 %G en %F 10_21136_CMJ_1969_100886