Publications
Rational subsets of partially reversible monoids. Theoret. Comput. Sci.. 2008;409:537-548.
Fixed points of endomorphisms of virtually free groups. Pacific J. Math.. 2013;263:207-240.
A geometric characterization of automatic monoids. Q. J. Math.. 2004;55:333-356.Edit
Clifford monoid presentations. Math. Proc. Cambridge Philos. Soc.. 1992;111:445-454.
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.
Dicionário de Matemática Elementar, de Stella Baruk. Vol 2 Edições Afrontamento 2005.Edit
Finite automata for Schreier graphs of virtually free groups. J. Group Theory. 2016;19:25-54.Edit
José Anastácio da Cunha e a Álgebra do seu tempo. CMUM ed. Portugal, Braga: Universidade do Minho. Centro de Matemática (CMAT) 2005.Edit
Fixed points of endomorphisms of certain free products. RAIRO Theor. Inform. Appl.. 2012;46:165-179.
[2017-28] On finitely generated submonoids of free groups .
[2010-14] Finite idempotent inverse monoid presentations .
Effects of pitch size and skill level on tactical behaviours of Association Football players during small-sided and conditioned games. International Journal of Sports Science & Coaching. 2014;9:993-1006.Edit
An application of first-order logic to the study of recognizable languages. Internat. J. Algebra Comput.. 2004;14:785-799.
A note on primeness of semigroup rings. Proc. Roy. Soc. Edinburgh Sect. A. 1992;120:191-197.
[2006-1] The Reaction of Stock Markets to Crashes and Events: A Comparison Study between Emerging and Mature .Edit
A wavelet-based method to measure stock market development. Open Journal of Statistics. 2014;4:86-96.Edit
Backward-stochastic-differential-equation approach to modeling of gene expression. Physical Review E. 2017;95:032418.Edit
Roughness in Cayley graphs. Inform. Sci.. 2010;180:3362-3372.Edit
The congruence $\eta^*$ on semigroups. Q. J. Math.. 2016;67:405-424.