A fast algorithm for Gaussian type quadrature formulae with mixed boundary conditions and some lumped mass spectral approximations. - Abdelkrim Ezzirani; Allal Guessab (Math. Comput., 1999)

Sharp Integral Inequalities of the Hermite-Hadamard Type. - Allal Guessab; Gerhard Schmeisser (J. Approx. Theory, 2002)

Convexity results and sharp error estimates in approximate multivariate integration. - Allal Guessab; Gerhard Schmeisser (Math. Comput., 2004)

Sharp Error Estimates for Interpolatory Approximation on Convex Polytopes. - Allal Guessab; Gerhard Schmeisser (SIAM J. Numer. Anal., 2005)

Construction of positive definite cubature formulae and approximation of functions via Voronoi tessellations. - Allal Guessab; Gerhard Schmeisser (Adv. Comput. Math., 2010)

Optimal bivariate C1 cubic quasi-interpolation on a type-2 triangulation. - Domingo Barrera; Allal Guessab; María J. Ibáñez; Otheman Nouisser (J. Comput. Appl. Math., 2010)

Error analysis for a non-standard class of differential quasi-interpolants. - Allal Guessab; María J. Ibáñez; Otheman Nouisser (Math. Comput. Simul., 2011)

A class of nonlinear four-point subdivision schemes - Properties in terms of conditions. - Allal Guessab; María Moncayo; Gerhard Schmeisser (Adv. Comput. Math., 2012)

Construction techniques for multivariate modified quasi-interpolants with high approximation order. - Domingo Barrera; Allal Guessab; María J. Ibáñez; Otheman Nouisser (Comput. Math. Appl., 2013)

Generalized barycentric coordinates and approximations of convex functions on arbitrary convex polytopes. - Allal Guessab (Comput. Math. Appl., 2013)

Increasing the approximation order of spline quasi-interpolants. - Domingo Barrera; Allal Guessab; María J. Ibáñez; Otheman Nouisser (J. Comput. Appl. Math., 2013)

On approximation of linear functionals over convex functions: Construction techniques and new directions. - Boujemâa Achchab; Allal Guessab (Appl. Math. Comput., 2014)

On the approximation of strongly convex functions by an upper or lower operator. - Osama Yousif Mohammed Alabdali; Allal Guessab (Appl. Math. Comput., 2014)

An integral inequality for cosine polynomials. - Horst Alzer; Allal Guessab (Appl. Math. Comput., 2014)

Symmetrization procedures and convexity in centrally symmetric polytopes. - Allal Guessab (Appl. Math. Comput., 2014)

Approximations of differentiable convex functions on arbitrary convex polytopes. - Allal Guessab (Appl. Math. Comput., 2014)

Symmetrization, convexity and applications. - Allal Guessab; Florian Guessab (Appl. Math. Comput., 2014)

A general approach to the construction of nonconforming finite elements on convex polytopes. - Boujemâa Achchab; Khalid Bouihat; Allal Guessab; Gerhard Schmeisser (Appl. Math. Comput., 2015)

A new class of nonconforming finite elements for the enrichment of Q1 element on convex polytope. - Boujemâa Achchab; Allal Guessab; Yassine Zaim (Appl. Math. Comput., 2015)

New cubature formulas and Hermite-Hadamard type inequalities using integrals over some hyperplanes in the d-dimensional hyper-rectangle. - Mostafa Bachar; Allal Guessab; Osama Mohammed 003; Yassine Zaim (Appl. Math. Comput., 2017)

An extended family of nonconforming quasi-Wilson elements for solving elasticity problem. - Boujemâa Achchab; Abdellatif Agouzal; Allal Guessab; Yassine Zaim (Appl. Math. Comput., 2019)

Extended Multidimensional Integration Formulas on Polytope Meshes. - Allal Guessab; Boris V. Semisalov (SIAM J. Sci. Comput., 2019)

A general class of enriched methods for the simplicial linear finite elements. - Francesco Dell'Accio; Filomena Di Tommaso; Allal Guessab; Federico Nudo (Appl. Math. Comput., 2023)

Enrichment strategies for the simplicial linear finite elements. - Francesco Dell'Accio; Filomena Di Tommaso; Allal Guessab; Federico Nudo (Appl. Math. Comput., 2023)

New quadratic and cubic polynomial enrichments of the Crouzeix-Raviart finite element. - Francesco Dell'Accio; Allal Guessab; Federico Nudo (Comput. Math. Appl., 2024)

A new quadratic and cubic polynomial enrichment of the Crouzeix-Raviart finite element. - Francesco Dell'Accio; Allal Guessab; Federico Nudo (CoRR, 2024)

Reconstructing algebraic functions from a nonconforming exponential weighted enriched finite element. - Francesco Dell'Accio; Allal Guessab; Gradimir V. Milovanovic; Federico Nudo (J. Comput. Appl. Math., 2025)