%0 Journal Article %T News and Notices %J Czechoslovak Mathematical Journal %D 1973 %V 23 %N 1 %I mathdoc %U https://geodesic-test.mathdoc.fr/articles/10.21136/CMJ.1973.101155/ %R 10.21136/CMJ.1973.101155 %G en %F 10_21136_CMJ_1973_101155