Publications
On finite simple semigroups. Proc. Edinburgh Math. Soc. (2). 1991;34:205-215.Edit
Finite semigroups and universal algebra. Vol 3 World Scientific Publishing Co., Inc., River Edge, NJ 1994.Edit
Free profinite semigroups over semidirect products. Izv. Vyssh. Uchebn. Zaved. Mat.. 1995:3-31.Edit
On free inverse monoid languages. RAIRO Inform. Théor. Appl.. 1996;30:349-378.
Free profinite $\scr R$-trivial monoids. Internat. J. Algebra Comput.. 1997;7:625-671.Edit
First homoclinic tangencies on the boundary of Anosov diffeomorphisms. Discrete and Continuous Dynamical Systems. 1998;4(4):765-782.
A family of degenerate Lie algebras. J. Geom. Phys.. 1999;31:51-63.Edit
Finitely generated commutative monoids Nova Science Publishers, Inc., Commack, NY 1999.Edit
On free affine semigroups. Semigroup Forum. 1999;58:367-385.Edit
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
On full affine semigroups. J. Pure Appl. Algebra. 2000;149:295-303.Edit
A functor from semigroups to rings. J. Pure Appl. Algebra. 2000;148:285-307.Edit
Finite semigroups: an introduction to a unified theory of pseudovarieties. In: Semigroups, algorithms, automata and languages (Coimbra, 2001). World Sci. Publ., River Edge, NJ; 2002. 3. p. 3-64p. Edit
On Fine and Wilf's theorem for bidimensional words. Theoret. Comput. Sci.. 2003;292:245-262.Edit
Francisco Gomes Teixeira. CIM Bulletin. 2004;16:21-23.Edit
Free group languages: rational versus recognizable. Theor. Inform. Appl.. 2004;38:49-67.
Frobenius-Padé approximants for d-orthogonal series: Theory and computational aspects. Applied Numerical Mathematics. 2004;52:89-112.Edit
Fundamental gaps in numerical semigroups. J. Pure Appl. Algebra. 2004;189:301-313.Edit
Fundamental gaps in numerical semigroups with respect to their multiplicity. Acta Math. Sin. (Engl. Ser.). 2004;20:629-646.Edit
Flowers or weeds? Bol. Soc. Port. Mat.. 2005:23-34.
On the Frobenius number of a proportionally modular Diophantine inequality. Port. Math. (N.S.). 2006;63:415-425.Edit