%0 Journal Article %A Rieger, Ladislav %T On countable generalised $\sigma$-algebras, with a new proof of Gödel's completeness theorem %J Czechoslovak Mathematical Journal %D 1951 %P 29-40 %V 01 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1951.100012/ %R 10.21136/CMJ.1951.100012 %G en %F 10_21136_CMJ_1951_100012