%0 Journal Article %A Ježek, Jaroslav %T The lattice of equational theories. Part I: Modular elements %J Czechoslovak Mathematical Journal %D 1981 %P 127-152 %V 31 %N 1 %I mathdoc %U https://geodesic-test.mathdoc.fr/articles/10.21136/CMJ.1981.101731/ %R 10.21136/CMJ.1981.101731 %G en %F 10_21136_CMJ_1981_101731