1. Implicit operations on finite J-trivial semigroups and a conjecture of I. Simon;Almeida;J. Pure Appl. Algebra,1990
2. Finite semigroups and universal algebra;Almeida,1995
3. Some algorithmic problems for pseudovarieties;Almeida;Publ. Math. Debrecen,1999
4. Finite semigroups: An introduction to a unified theory of pseudovarieties;Almeida,2002
5. Profinite semigroups and applications;Almeida,2005