%0 Journal Article %A Pultr, Aleš %A Sichler, Jiří %T Primitive classes of algebras with two unary idempotent operations, containing all algebraic categories as full subcategories %J Commentationes Mathematicae Universitatis Carolinae %D 1969 %P 425-445 %V 10 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1969__10_3_a5/ %G en %F CMUC_1969__10_3_a5