Publications
a partitional clustering algorithm validated by a clustering tendency index based on graph theory. pattern recognition. 2006;39:776-788.Edit
Renaissance sources of Juan Pérez de Moya’s geometries. Asclepio. Revista de Historia de la Medicina y de la Ciencia. 2013;65 (2)(julio-diciembre ):1-18.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.
On unique factorization semilattices. Discuss. Math. Gen. Algebra Appl.. 2000;20:97-120.
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
Conjugacy and transposition for inverse monoid presentations. Internat. J. Algebra Comput.. 1996;6:607-622.
[2017-28] On finitely generated submonoids of free groups .
A note on pure and $p$-pure languages. Acta Inform.. 2003;39:579-595.
On finite-index extensions of subgroups of free groups. J. Group Theory. 2010;13:365-381.Edit
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
Trees associated to inverse monoid presentations. J. Pure Appl. Algebra. 2001;165:307-335.
[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.
Evidence-Based Decision About Test Scoring Rules in Clinical Anatomy Multiple-Choice Examinations. Anatomical Sciences Education. 2015;8(3).Edit