Almeida JPBM JAT Freitas, "Alternative approach to the formulation of hybrid equilibrium finite elements", Comput & Struct, 1991.
Almeida JPBM JAT Freitas, "Continuity conditions for finite element analysis of solids", Int J Num Meth Eng, 1992.
Almeida JPBM JAT Freitas, "Some aspects on the parallel implementation on non conventional finite element formulations", in Advanced Finite Element Solution Techniques, M Papadrakakis, Ed., CIMNE, Barcelona, 1995.
Almeida JPBM JAT Freitas, "Equilibrated or compatible finite element solutions in the elastoplastic analysis of stretching plates", in Advanced Finite Element Solution Techniques, M Papadrakakis, Ed., CIMNE, Barcelona, 1995.
Castro LMSS JAT Freitas, "On the implementation of a mixed finite element formulation based on digital interpolation", Comput & Struct, 1994.
Castro LMSS JAT Freitas, "Hybrid-mixed finite element elastoplastic analysis based on Walsh and Wavelet interpolation", in Advanced Finite Element Solution Techniques, M. Papadrakakis, Ed., CIMNE, Barcelona, 1995.
Dong Y-F, JAT Freitas, "An efficient 8-node incompatible solid element with stress interpolation", Comput & Struct, 1992.
Dong Y-F, JAT Freitas, "A quadrilateral hybrid stress element for Mindlin plates based on incompatible displacements", Int J Num Meth Eng, 1994.
Dong Y-F JAT Freitas, "Alternative approach for hybrid stress elements with incompatible displacements", Int J Comput Meth Appl Mech Eng, 1994.
Dong Y-F JAT Freitas, "A quadrilateral hybrid stress element for Mindlin plates based on incompatible displacements", Int J Num Meth Eng, 1994.
Dong Y-F M-G Huang JAT Freitas, "A triangular bending element based on modified displacements shape functions and assumed stress interpolations", Finite Elem Anal Design, 1994.
Dong Y-F C-C Wu JAT Freitas, "The hybrid stress model for Mindlin-Reissner plates based on a stress optimisation condition", Comput & Struct, 1993.
Freitas JAT, "Mixed and hybrid symmetric formulations for the boundary integral method", Euro J Mech-Solids, 1990.
Freitas JAT, "Elastic-plastic analysis of structural cross-sections", in Mathematical Programming Methods in Structural Analysis, D Lloyd Smith, Ed, Springer-Verlag, 1990.
Freitas JAT, "Piecewise linear elastic-plastic stress-strain relations", in Mathematical Programming Methods in Structural Analysis, D Lloyd Smith, Ed, Springer-Verlag, 1990.
Freitas JAT, "Elastoplastic analysis of skeletal structures", in Mathematical Programming Methods in Structural Analysis, D Lloyd Smith, Ed, Springer-Verlag, 1990.
Freitas JAT, "A gradient method for elastic-plastic analysis of structures", in Mathematical Programming Methods in Structural Analysis, D Lloyd Smith, Ed, Springer-Verlag, 1990.
Freitas JAT, "Large displacement elastoplastic analysis of structures", in Mathematical Programming Methods in Structural Analysis, D Lloyd Smith, Ed, Springer-Verlag, 1990.
Freitas JAT, "A kinematic model for plastic limit analysis of solids by the boundary integral method", Int J Comput Meth Appl Mech Eng, 1991.
Freitas JAT, "Hybrid finite element formulations for elastodynamic analysis in the frequency domain", Int J Solids Struct, submitted for publication, 1995.
Freitas JAT JPBM Almeida EMBR Pereira, "Alternative hybrid formulations for the finite element method", in FEM Today And The Future, J Robinson, Ed., Robinson and Assoc., 1993.
Freitas JAT JPBM Almeida EMBR Pereira, "Non-conventional hybrid/mixed formulations for the finite element method", In Education, Practice And Promotion Of Computational Methods In Engineering, ERA Oliveira and J Bento, Eds., Technopress, Seoul, 1995.
Freitas JAT LMSS Castro, "Digital interpolation in mixed finite element structural analysis", Comput & Struct, 1992.
Freitas JAT LMSS Castro, "Finite element solutions with Walsh series and Wavelets", Comput Meth Appl Mech, in press, 1996.
Freitas JAT Z-Y Ji, "Hybrid-Trefftz boundary integral formulation for simulation of singular stress fields", Int J Num Meth Eng, 1996.
Freitas JAT Z-Y Ji, "Hybrid-Trefftz equilibrium model for crack problems", Int J Num Meth Eng, 1996.
Freitas JAT Z-Y Ji, "Hybrid-Trefftz stress elements for plate bending analysis", Int J Num Meth Eng, submitted for publication, 1995.
Freitas JAT Z-Y Ji, "Hybrid-Trefftz stress elements for thin plate bending analysis", Int J Num Meth Eng, submitted for publication, 1995.
Freitas JAT CAP Martins, "Análise elastoplástica de treliças tridimensionais", Rev Port Eng Estruturas, 1991.
Freitas JAT EMBR Pereira, "Application of the Mathieu series to the boundary integral method", Comput & Struct, 1991.
Freitas JAT ACBS Ribeiro, "Large displacement elastoplastic analysis of space trusses", Comput & Struct, 1992.
Pereira EMBR JAT Freitas, "A mixed-hybrid finite element model based on orthogonal functions", Int J Num Meth Eng, in press, 1996.
Pereira EMBR JAT Freitas, "A hybrid-mixed finite element model based on Legendre polynomials for Reissner-Mindlin plates", Comp Methods Appl Mech Engng, in press, 1996.
Almeida JPBM JAT Freitas, "Use of simple routines for polynomial operations in finite element calculations", EPMESCIII, Macau, 1990.
Almeida JPBM JAT Freitas, "Some aspects on the parallel implementation on non conventional finite element formulations", COMPLAS95, Barcelona, 1995.
Almeida JPBM JAT Freitas, "Equilibrated or compatible finite element solutions in the elastoplastic analysis of stretching plates", COMPLAS95, Barcelona, 1995.
Castro LMSS JAT Freitas, "Walsh function processing in the context of elastostatics", EPMESCIV, Dalian, 1992.
Castro LMSS JAT Freitas, "On the implementation of a mixed finite element formulation based on digital interpolation", CivilCompV, Edinburgh, 1993.
Castro LMSS JAT Freitas, "Mixed finite element elastoplastic analysis based on Walsh and Wavelet interpolation", COMPLAS95, Barcelona, 1995.
Castro LMSS JAT Freitas, "Wavelets in mixed-hybrid finite element formulations", EPMESCV, Macau, 1995.
Dong Y-F JAT Freitas, "An efficient 8-node incompatible solid element with stress interpolation", Computational Structures Technology, Edinburgh, 1991.
Dong Y-F JAT Freitas, "On the hybrid stress methods for axisymmetric and quasi incompressible solids", EPMESCIV, Dalian, 1992.
Dong Y-F JAT Freitas, "Alternative approach for hybrid stress elements with incompatible displacements", CivilCompV, Edinburgh, 1993.
Freitas JAT, "Hierarchical 2-D equilibrium finite elements based on Chebyshev interpolation functions", CivilCompV, Edinburgh,1993.
Freitas JAT JPBM Almeida EMBR Pereira, "Alternative hybrid formulations for the finite element method", VII World Congress on Finite Element Methods, Monaco, 1993.
Freitas JAT JPBM Almeida EMBR Pereira, "Non-Conventional Hybrid/Mixed Formulations for the Finite Element Method", EPMESCV, Macau, 1995.
Freitas JAT JPBM Almeida EMBR Pereira, "Non-Conventional Hybrid/Mixed Formulations for the Finite Element Method", EPMESCV, Macau, 1995.
Freitas JAT LMSS Castro, "Digital interpolation in mixed finite element analysis", Computational Structures Technology, Edinburgh, 1991.
Freitas JAT LMSS Castro, "Walsh interpolation in mixed finite element elastoplastic plate analysis", Computer Methods in Mechanics, Kielce-Cedzyna, 1993.
Freitas JAT LMSS Castro, "Mixed finite element elastoplastic analysis based on Walsh and Wavelet interpolation", COMPLASIV, Barcelona, 1995.
Freitas JAT LMSS Castro, " Finite element solutions with Walsh series and Wavelets", Computers and the Future of Structural Mechanics, Kraków, 1995.
Freitas JAT C Cismasiu, "A displacement model for the hybrid-Trefftz finite element formulation", Int Conf Comput Struct Technology, Budapest, 1996.
Freitas JAT C Cismasiu, "Numerical implementaion of hybrid-Trefftz displacement elements", Int Conf Comput Struct Technology, Budapest, 1996.
Freitas JAT Y-F Dong, "Implementation of Michell's polynomial stress functions in hybrid finite element codes", EPMESCIV, Dalian, 1992.
Freitas JAT EMBR Pereira, "Application of the Mathieu series to the boundary integral method", Computational Structures Technology, Edinburgh, 1991.
Grupo de Análise de Estruturas, "Actividade no âmbito da Mecânica Computacional", IV Enc Nac Mec Computacional, Lisboa, 1995.
Pereira EMBR JAT Freitas, "Non-linear analysis of reinforced concrete frames in mini computers", EPMESCIII, Macau, 1990.
Pereira EMBR JAT Freitas, "Implementation of a mixed-hybrid finite element model based on Legendre polynomials", EPMESCV, Macau, 1995.