%0 Journal Article %A Jerzy Płonka %T On equational classes of abstract algebras defined by regular equations %J Fundamenta Mathematicae %D 1969 %P 241-247 %V 64 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-64-2-241-247/ %R 10.4064/fm-64-2-241-247 %G en %F 10_4064_fm_64_2_241_247