%0 Journal Article %A Duda, Jaromír %T Coherence and weak coherence in the square of algebras %J Czechoslovak Mathematical Journal %D 1992 %P 613-618 %V 42 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1992.128370/ %R 10.21136/CMJ.1992.128370 %G en %F 10_21136_CMJ_1992_128370