Papers in International Journals

• Grace, S.R.; Argawal, R.P.; Pinelas, Sandra (2009) On the oscillations of fourth order functional differential equations Communications in Applied Analysis: 13(1), 93-104.

• Soares, Filipa; McAlister, D. B. (2009) One-dimensional tiling semigroups and factorial languages Communications in Algebra: 37(1), 276-295.

• Pinelas, Sandra (2009) Oscillations and nonoscillations in mixed differential equations with monotonic delays and advances Advances in Dynamical Systems and Applications: 4(1), 107-121.

• Agarwal, R.P.; Pinelas, Sandra (2009) Qualitative theory of divided difference first order systems Communications on Applied Nonlinear Analysis: 16(2), 83-105.

• Robertson, A. .; Sequeira, Adélia; Owen, R. (2009) Rheological models for blood Cardiovascular Mathematics: 1, 211-241.

• Boente, Graciela; Pires, Ana M.; Rodrigues, Isabel M. (2009) Robust Tests for the Common Principal Components Model Journal of Statistical Planning and Inference: 139(4), 1332-1347.

• Baek, C.; Pipiras, Vladas; Wendt, H.; Abry, P. (2009) Second order properties of distribution tails and estimation of tail exponents in random difference equations Extremes: 12, 361-400.

• Bernal, Francisco; Gutierrez, Gail (2009) Solving delay differential equations through RBF collocation. Advances in Applied Mathematics and Mechanics: 1(2), 257-272.

• Alves, Carlos J. S.; Silvestre, Ana Leonor; Takahashi, Takeo; Tucsnak, Marius (2009) Solving Inverse Source Problems Using Observability. Applications to the Euler-Bernoulli Plate Equation SIAM Journal on Control and Optimization: 48(3), 1632-1659.

• Avelino, Catarina P.; Santos, Altino F. (2009) Spherical f-tilings by scalene triangles and isosceles trapezoids, I European Journal of Combinatorics: 30(5), 1221-1244.

• Avelino, Catarina P.; Santos, Altino F.  (2009) Spherical f-tilings by scalene triangles and isosceles trapezoids, III Electronic Journal of Combinatorics: 16(1), #R87.

• Silvestre, Ana Leonor (2009) Steady Solutions with Finite Kinetic Energy for a Perturbed Navier-Stokes System in R-3 Journal of Differential Equations: 247(7), 2124-2139.

• Canto e Castro, Luisa; Dias, Sandra; Temido, Maria da Graça (2009) Tail inference for a law in a max-semistable domain of attraction Pliska Studia Mathematica Bulgarica: 19, 83-96.

• Alves, Carlos J. S.; Martins, Nuno F. M. (2009) The Direct Method of Fundamental Solutions and the Inverse Kirsch-Kress Method for the Reconstruction of Elastic Inclusions OR Cavities Journal of Integral Equations and Applications: 21(2), 153-178.

• Fountain, John; Gomes, Gracinda M. S.; Gould, Victoria (2009) The free ample monoid International Journal of Algebra and Computation: 19(4), 527-554.

• Branco, Mário J. J.; Gomes, Gracinda M. S. (2009) The generalized Szendrei expansion of an R-unipotent semigroup Acta Mathematica Hungarica: 123(1-2), 11-26.

• Alves, Carlos J. S.; Antunes, Pedro R. S. (2009) The method of fundamental solutions applied to the calculation of eigensolutions for 2D plates International Journal for Numerical Methods in Engineering: 77(2), 177–194.

• Araújo, João; Schneider, Csaba (2009) The Rank of the Endomorphism Monoid of a Uniform Partition Semigroup Froum: 78(3), 498-510.

• Gudiño, Elias; Gutman, Ivan; Quiroz, Domingo (2009) Upper bound for the energy of graphs with fixed second and fourth spectral moments Kragujevac Journal of Mathematics: 32, 27-35.

• Bernal, Francisco; Gutiérrez, G.; Kindelan, M. (2009) Use of singularity capturing functions in the solution of problems with discontinuous boundary conditions Engineering Analysis with Boundary Elements: 33(2), 200-208.

• Kulikov, Gennady Yu; Shindin, S.K. (2008)  Local and global error estimation in Nordsieck methods Russian Journal of Numerical Analysis and Mathematical Modelling: 23(6), 567-595.

• Carapau, F.; Sequeira, Adélia (2008) 1D dynamics of a second-grade viscous fluid in a constricted tube Banach Center Publ., Inst. Math, Polish Acad. Sc.: 81, 95-103.

• Sellountos, Euripides; Sequeira, Adélia (2008) A Hybrid Multi-Region BEM/LBIE-RBF Velocity-Vorticity Scheme for the Two-Dimensional Navier-Stokes Equations CMES-Computer Modeling in Engineering & Sciences: 23(2), 127-147.

• Antunes, Pedro R. S.; Freitas, Pedro (2008) A Numerical Study of the Spectral Gap Journal of Physics A-Mathematical and Theoretical: 41(5), 055201.

• Valtchev, Svilen S. ; Roberty, Nilson C. (2008) A Time-Marching MFS Scheme for Heat Conduction Problems Engineering Analysis with Boundary Elements: 32(6), 480-493.

• Estepa, A.; Estepa, R.; Pacheco, António (2008) Accurate resource estimation for generalized VoIP sources Telecommunication Systems: 39(1), 37-50.

• Sellountos, Euripides; Sequeira, Adélia (2008) An Advanced Meshless LBIE/RBF Method for Solving Two-Dimensional Incompressible Fluid Flows Computational Mechanics: 41(5), 617-631.

• Videman, J. H.; Nazarov, S.A. (2008) An Improved Nonlinear Reynolds Equation for a Thin Flow of a Viscous Incompressible Fluid Vestnik State Petersburg University: Mathematics: 41, 171-175.

• Martins, Nuno F. M.; Silvestre, Ana Leonor (2008) An Iterative MFS Approach for the Detection of Immersed Obstacles Engineering Analysis with Boundary Elements: 32(6), 517-524.

• Ferreira, Fátima; Pacheco, António (2008) Analysis of GI^X/M(n)//N systems with stochastic customer acceptance policy Queueing Systems: 58(1), 29-55.

• Nazarov, Serguei A.; Sequeira, Adélia; Specovius-Neugebauer, Maria; Videman, J. H. (2008) Artificial Boundary Conditions for Viscoelastic Flows Mathematical Methods in the Applied Sciences: 31(8), 937-958.

• Kulikov, Gennady Yu; Khrustaleva, E.Yu. (2008) Automatic step size and order control in explicit one-step extrapolation methods Computational Mathematics and Mathematical Physics: 48(8), 1313-1326.

• Kulikov, Gennady Yu; Khrustaleva, E.Yu. (2008) Automatic step size and order control in implicit one-step extrapolation methods Computational Mathematics and Mathematical Physics: 48(9), 1545-1569.

• Konyukhova, N.B.; Lima, Pedro M.; Morgado, M. Luísa; Soloviev, M.B. (2008) Bubbles and droplets in nonlinear physics models: analysis and numerical simulation of singular nonlinear boundary value problems Computational Mathematics and Mathematical Physics: 48(11), 2018-2058.

• Pacheco, António; Ribeiro, Helena (2008) Consecutive customer losses in oscillating GI^(X)/M//n systems with state dependent services rates Annals of Operations Research: 162(1), 143-158.

• Pacheco, António; Ribeiro, Helena (2008) Consecutive customer losses in regular and oscillating M^X/G/1/n systems Queueing Systems. Theory and Applications.: 58(2), 121-136.

• Matucci, Francesco (2008) Cryptanalysis of the Shpilrain-Ushakov Protocol in Thompson's Group Journal of Cryptology: 21(3), 458--468.

• Boente, Graciela; Pires, Ana M.; Rodrigues, Isabel M. (2008) Estimators for the Common Principal Components Model Based on Reweighting: Influence Functions and Monte Carlo Study Metrika: 67(2), 189-218.

• Morais, M. C. ; Okhrin, Y.; Pacheco, António; Schmid, W. (2008) EWMA charts for multivariate output: some stochastic ordering results Communications in Statistics - Theory and Methods: 37(16), 2653-2663.

• Gomes, Gracinda M. S.; Gould, Victoria (2008) Fundamental semigroups having a band of idempotents Semigroup Forum: 77, 279-299.

• Didier, G.; Pipiras, Vladas (2008) Gaussian stationary processes: adaptive wavelet decompositions, discrete approximations and their convergence Journal of Fourier Analysis and Applications: 14, 203-234.

• Ferreira, Helena; Pereira, Luísa (2008) How to compute the extremal index of stationary random fields Statistics & Probability Letters: 78(11), 1301–1304.

• Pipiras, Vladas; Taqqu, M.S. (2008) Identification of periodic and cyclic fractional stable motions Annales de L'Institute Henry Poincare: 44, 612-637.

• Pires, Ana M.; Amado, Conceição (2008) Interval Estimators for a Binomial Proportion: Comparison of Twenty Methods Revstat-Statistical Journal: 6(2), 165-197.

• Bebiano, N.; Da Providencia, J.; Nata, A.; Soares, Graça (2008) Krein Spaces Numerical Ranges and Their Computer Generation Electronic Journal of Linear Algebra: 17, 92-208.

• Lehtonen, Erkko (2008) Labeled posets are universal European J. Combin.: 29, 493-506.

• Artoli, A. M.; Sequeira, Adélia; Silva-Herdade, A. S.; Saldanha, C. (2008) Localized Hydrodynamics of Clustering Leukocytes Clinical Hemorheology and Microcirculation: 39(1-4), 375-380.

• Pacheco, António; Ribeiro, Helena (2008) Moments of the duration of busy periods of M^X/G/1/n systems Probability in the Engineering and Informational Sciences: 22(3), 347-354.

• Alves, Carlos J. S.; Cruzeiro, A. B. (2008) Monte-Carlo Simulation of Stochastic Differential Systems - a Geometrical Approach Stochastic Processes and Their Applications: 118(3), 346-367.

• Doorly, D. J. ; Taylor, D. J.; Gambaruto, A. M.; Schroter, R. C. ; Tolley, N. (2008) Nasal Architecture: Form and Flow Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences: 366(1879), 3225-4616.