Rosales J., García-Sánchez PA, García-García JI. Atomic commutative monoids and their elasticity. Semigroup Forum. 2004;68:64-86.Edit

Tome A., Teixeira A., Lang EW, Stadlthanner K, Rocha AP, Almeida R. Blind source separation using time-delayed signals. In: {IEEE International Joint Conference on Neural Networks (IJCNN)}. Vol {3}. {IEEE}; 2004. {. {p. 2187-2191p. }.Edit

da Costa JF, Rao P.. Central partition for a partition-distance and strong pattern graph. REVSTAT. 2004;2:127-143.Edit

[2004-42] Rocha F, Basto-Gonçalves J. Classification of linear differential equations near infinity .Edit

Matos J., Gama SM, Ryskin H., Duarte J.. An econophysics approach to the Portuguese Stock Index – PSI-20. Physica A. 2004;342:665-676.Edit

[2004-1] Matos J., Gama SM, Ruskin HJ, Duarte JA. An Econophysics Approach to the Portuguese Stock Index - PSI-20 .Edit

Rosales J., García-Sánchez PA, García-García JI. Every positive integer is the Frobenius number of a numerical semigroup with three generators. Math. Scand.. 2004;94:5-12.Edit

García-Sánchez PA, Rosales JC. Every positive integer is the Frobenius number of an irreducible numerical semigroup with at most four generators. Ark. Mat.. 2004;42:301-306.Edit

[2004-15] Matos JM, Rocha Z. Frobenius-Padé approximants for d-orthogonal series: theory and computational aspects .

Rosales J., García-Sánchez PA, García-García JI, Madrid J.. Fundamental gaps in numerical semigroups. J. Pure Appl. Algebra. 2004;189:301-313.Edit

Rosales J., García-Sánchez PA, García-García JI, Madrid J.. Fundamental gaps in numerical semigroups with respect to their multiplicity. Acta Math. Sin. (Engl. Ser.). 2004;20:629-646.Edit

[2004-39] Basto-Gonçalves J, Reis H.. The geometry of quadratic 2x2 systems of conservation laws .Edit

[2004-27] Labouriau IS, Ruas MA. Invariants for bifurcations .Edit

Matos J., Rodrigues MJ, Vasconcelos PB. New implementation of the Tau method for PDEs. Journal of Computational and Applied Mathematics. 2004;164(1):555-567.Edit

Matos J, Rodrigues MJ, Vasconcelos PB. New implementation of the tau method for PDEs. In: Proceedings of the 10th International Congress on Computational and Applied Mathematics (ICCAM-2002). Vol 164/165.; 2004. 5. p. 555-567p. Edit

Rosales J., García-Sánchez PA. Numerical semigroups with embedding dimension three. Arch. Math. (Basel). 2004;83:488-496.Edit

Almeida R, Pueyo E, Martínez JP, Rocha AP, Laguna P. Quantification of the QT variability related to HRV: Robustness study facing automatic delineation and noise on the ECG. In: {31st Annual Scientific Meeting on Computers in Cardiology}. Vol {31}. {IEEE}; 2004. {. {p. 769-772p. }.Edit

Rosales J., García-Sánchez PA, García-García JI, Branco MB. Saturated numerical semigroups. Houston J. Math.. 2004;30:321-330 (electronic).Edit

[2004-29] Reis H. Semi-complete vector fields of saddle-node type in C^n .

Labouriau IS, Rito CM. Stability of equilibria in equations of Hodgkin-Huxley type. In: Real and complex singularities. Vol 354. Amer. Math. Soc., Providence, RI; 2004. 1. p. 137-143p. (Contemp. Math.; vol 354).Edit

[2004-32] Rebelo P, Smirnov GV. A uniform cooling of alloys .Edit

Martínez JP, Almeida R, Olmos S., Rocha AP, Laguna P. A wavelet-based ECG delineator: Evaluation on standard databases. {IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING}. 2004;{51}:{570-581}.Edit

Gouveia S., Rocha AP, Van De Borne P., Lago P. Assessing baroreflex sensitivity in the sequences technique: Local versus global approach. In: {32nd Annual Conference on Computers in Cardiology}. Vol {32}. {IEEE}; 2005. {. {p. 279-282p. }.Edit

Rosales J., García-Sánchez PA, Urbano-Blanco J.. Correction to: ``Modular Diophantine inequalities and numerical semigroups'' [Pacific J. Math. \bf 218 (2005), no. 2, 379–398; \refcno 2218353]. Pacific J. Math.. 2005;220:199.Edit

Tome A., Teixeira A., Lang EW, Stadlthanner K, Rocha AP, Almeida R. dAMUSE - A new tool for denoising and blind source separation. {DIGITAL SIGNAL PROCESSING}. 2005;{15}:{400-421}.Edit