%0 Journal Article %A Roman Suszko %T Equational logic and theories in sentential languages %J Colloquium Mathematicum %D 1974 %P 19-23 %V 29 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-29-1-19-23/ %R 10.4064/cm-29-1-19-23 %G en %F 10_4064_cm_29_1_19_23