On the join of equational classes of idempotent algebras and algebras with constants

Instytut Matematyczny Polskiej Akademii Nauk / Institute of Mathematics / Publishing house / Journals and Serials / Colloquium Mathematicum / All issues

J. Płonka Colloquium Mathematicum 27 (1973), 193-195 DOI: 10.4064/cm-27-2-193-195