Publications
Clifford monoid presentations. Math. Proc. Cambridge Philos. Soc.. 1992;111:445-454.
A geometric characterization of automatic monoids. Q. J. Math.. 2004;55:333-356.Edit
Fixed points of endomorphisms over special confluent rewriting systems. Monatsh. Math.. 2010;161:417-447.
The word problem for nilpotent inverse monoids. Semigroup Forum. 1995;51:285-293.
Fixed points of endomorphisms of certain free products. RAIRO Theor. Inform. Appl.. 2012;46:165-179.
Field dimension and skill level constrain team tactical behaviours in small-sided and conditioned games in football. Journal of sports sciences. 2014;32:1888-1896.Edit
A note on primeness of semigroup rings. Proc. Roy. Soc. Edinburgh Sect. A. 1992;120:191-197.
An application of first-order logic to the study of recognizable languages. Internat. J. Algebra Comput.. 2004;14:785-799.
Contribuição para o estudo do manuscrito Arte de Marear de Juan Pérez de Moya. LLULL. 2012;35(76):351-379.Edit
On unique factorization semilattices. Discuss. Math. Gen. Algebra Appl.. 2000;20:97-120.
On the circulation of algebraic knowledge in the Iberian península: the sources of Pérez de Moya's Tratado de Arithmetica (1573). Revue d'histoire des mathématiques . 2016;2:145-184.Edit
Conjugacy and transposition for inverse monoid presentations. Internat. J. Algebra Comput.. 1996;6:607-622.
[2010-14] Finite idempotent inverse monoid presentations .
A note on pure and $p$-pure languages. Acta Inform.. 2003;39:579-595.
Trees associated to inverse monoid presentations. J. Pure Appl. Algebra. 2001;165:307-335.
On finite-index extensions of subgroups of free groups. J. Group Theory. 2010;13:365-381.Edit