 Universal algebra in smonoidal categories (AlgebraBerichte ; Nr. 20) by Michael Pfender, 1974
 Generalized universal algebra in initialstructure categories (Mathematisches Institut der Universitat Munchen. AlgebraBerichte, Nr. 10) by Manfred Bernd Wischnewsky, 1973
 Universal algebra over Hopfalgebras (AlgebraBerichte ; Nr. 26) by Helmut Rohrl, 1974
 AlgebrasLatticesVarieties (Wadsworth English for Academic Purposes Series) by Ralph N. McKenzie, 19870630
 Circuit algebra: Introduction by Edmund Callis Berkeley, 1953
 Filtral and ideal classes of universal algebras (Quaderni dell'Istituto di matematica dell'Universita di Siena) by Raffaella Franci, 1976
 Universal classes of monadic algebras (SeÌminaires de matheÌmatique pure. Rapport) by Th Lucas, 1974
 LATTICES, SEMIGROUPS, AND UNIVERSAL ALGEBRA (HB) " by Almeida/bordalo, 1990
 Variety (Universal Algebra): Universal Algebra, Class, Algebraic Structure, Signature, Identity, Homomorphism, Subalgebra, Direct Product, Garrett Birkhoff, ... Absorption Law, Lattice, Semigroup
 Universal algebra in a closed category (Rapport / SeÌminaires de matheÌmatique pure) by Francis Borceux, 1976
 Treatise on Universal Algebra with applications, Volume I by Alfred North Whitehead, 1991
 Universal Algebra, Algebraic Logic, and Databases (Mathematics and Its Applications) by B. Plotkin, 1980
 Mathematics and psychology: Universal algebra. Latticetheoretic models for logic by Garrett Birkhoff, 1968
 Universal Algebra: Mathematics, Algebraic Structure, Operation, Function, Constant, Complete Lattice, Associativity, Predicate Logic
