@article{CMUC_1969__10_3_a5,
     author = {Pultr, Ale\v{s} and Sichler, Ji\v{r}{\'\i}},
     title = {Primitive classes of algebras with two unary idempotent operations, containing all algebraic categories as full subcategories},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {425--445},
     publisher = {mathdoc},
     volume = {10},
     number = {3},
     year = {1969},
     mrnumber = {0253969},
     zbl = {0206.29904},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1969__10_3_a5/}
}