%0 Journal Article %T Summaries of articles published in this issue %J Czechoslovak Mathematical Journal %D 1976 %P 507 %V 26 %N 4 %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1976.101424/ %R 10.21136/CMJ.1976.101424 %G en %F 10_21136_CMJ_1976_101424