Publications
The algebra of implicit operations. Algebra Universalis. 1989;26:16-32.Edit
Algebraic varieties characterizing matroids and oriented matroids. Adv. Math.. 1991;87:160-185.Edit
The Arrhenius plot of a physiological rate process is never linear. Ciência e Cultura. 1991;43(5):363-369.Edit
On Abel type integral equations of first kind. J. Fract. Calc.. 1994;5:59-68.Edit
Approximate filters for a nonlinear discrete time filtering problem with small observation noise. Stochastics and Stochastics Reports. 1994:1-24.Edit
About a new class of integral transforms in Hilbert space. Math. Balkanica (N.S.). 1995;9:179-191.
Applications of $N$-fractional calculus to infinite sums. J. Fract. Calc.. 1995;8:37-42.Edit
Is autonomic control of the heart rate at rest altered by detraining? A study of heart rate variability in professional soccer players. {Revista portuguesa de cardiologia : orgão oficial da Sociedade Portuguesa de Cardiologia = Portuguese journal of cardiology : an official journal of the Portuguese Society of Cardiology}. 1997;{16}:{535-541, 508}.Edit
ARCADE: A Prediction Method for Nominal Variables. Intelligent Data Analysis. 1998;2:265-286.Edit
arcade: a prediction method for nominal variables. intelligent data analysis. 1998;2:265-286.Edit
Analytic $k$-linearizability of some resonant Poisson structures. Lett. Math. Phys.. 1999;49:59-66.Edit
Approximate Nonlinear Filtering for a Two-dimensional Diffusion with One Dimensional Observations in a Low Noise Channel. In: Prépublication du Laboratoire de Mathématiques Appliquées.; 1999. Edit
An addendum: ``The gap between partial and full'' [Internat. J. Algebra Comput. \bf 8 (1998), no. 3, 399–430; MR1627844 (99g:20102)]. Internat. J. Algebra Comput.. 2001;11:131-135.Edit
Analytic linearizability of some resonant vector fields. Proc. Amer. Math. Soc.. 2001;129:2473-2481 (electronic).Edit
About Cartan geometrization of non-holonomic mechanics. J. Geom. Phys.. 2003;45:1-23.
Approximate Nonlinear Filtering for a Two-dimensional Diffusion with One-dimensional Observations in a Low Noise Channel. SIAM Journal on Control and Optimization. 2003:1801-1819.Edit
Abelian kernels of monoids of order-preserving maps and of some of its extensions. Semigroup Forum. 2004;68:335-356.Edit
The analysis of heart rate variability using independent component signals. In: Tilg B., editor. {2nd IASTED International Conference on Biomedical Engineering}. {ACTA PRESS}; 2004. {. {p. 240-243p. }.Edit
The analysis of heart rate variability using independent component signals. In: {Proceedings of the IASTED International Conference on Biomedical Engineering}.; 2004. {. {p. 240-243p. }.Edit
An application of first-order logic to the study of recognizable languages. Internat. J. Algebra Comput.. 2004;14:785-799.