1. M. Abbadini, V. Marra, L. Spada, Stone-Gelfand duality, for groups: topological duality and equational axiomatisation for norm-complete lattice-ordered groups, 2021, in preparation.
2. On quasivarieties and varieties as categories;Adámek;Stud. Log.,2004
3. Abstract and Concrete Categories: The Joy of Cats;Adámek,2006
4. Locally Presentable and Accessible Categories;Adámek,1994
5. Algebraic Theories: A Categorical Introduction to General Algebra;Adámek,2010