Almeida J, Azevedo A. On regular implicit operations. Portugal. Math.. 1993;50:35-61.Edit

Almeida J, Azevedo A, Zeitoun M. Pseudovariety joins involving $\scr J$-trivial semigroups. Internat. J. Algebra Comput.. 1999;9:99-112.Edit

Azevedo A, Machiavelo A. A large-denominator problem. Bol. Soc. Port. Mat.. 2012:9-12.Edit

Almeida J, Azevedo A. The join of the pseudovarieties of $\scr R$-trivial and $\scr L$-trivial monoids. J. Pure Appl. Algebra. 1989;60:129-137.Edit

Almeida J, Azevedo A. Implicit operations on certain classes of semigroups. In: Semigroups and their applications (Chico, Calif., 1986). Reidel, Dordrecht; 1987. 1. p. 1-11p. Edit

Almeida J, Azevedo A. Globals of pseudovarieties of commutative semigroups: the finite basis problem, decidability and gaps. Proc. Edinb. Math. Soc. (2). 2001;44:27-47.Edit

Almeida J, Azevedo A, Teixeira L. On finitely based pseudovarieties of the form $\bf V\ast\bf D$ and $\bf V\ast\bf D_n$. J. Pure Appl. Algebra. 2000;146:1-15.Edit

Carvalho M, Azevedo A, Machiavelo A. Dynamics of a quasi-quadratic map. Journal of Difference Equations and Applications. 2014;20 (1):36-48.Edit