#### CHRISTOS XENOPHONTOS

**C. Xenophontos**,

*An hp finite element method for a convection-reaction-diffusion singularly perturbed problem with two small parameters*, International Journal of Numerical Analysis and Modeling, Vol. 18, No. 4, pp. 481 – 499 (2021).

**C. Xenophontos**,

*Analysis of non-conforming DPG methods on polyhedral meshes using fractional Sobolev norms*, Computers and Mathematics with Applications, Vol. 95, pp. 215 – 241 (2021)

**Xenophontos**and I. Sykopetritou,

*Isogeometric Analysis for singularly perturbed problems in 1-D: error estimates*, Electronic Transactions in Numerical Analysis, Vol. 20, pp. 1 – 25 (2020).

**C. Xenophontos**,

*A mixed hp finite element method for a 4th order singularly perturbed problem*, Num. Meth. PDEs Vol. 35, pp. 114 - 127 (2019).

**C. Xenophontos**,

*Finite element approximation of singularly perturbed reaction-diffusion problems using an exponentially graded mesh*, Comp. Math. Appl., Vol. 76, pp. 2523 - 2534 (2018).

**Xenophontos**, *A parameter robust finite element method for fourth order singularly perturbed problems*, Computational Methods in Applied Mathematics, Vol. 17, pp. 337 - 350 (2017).

Constantinou and **C. Xenophontos**, *An hp finite element method for a 4 ^{th} order singularly perturbed boundary value problem in two dimensions*, Computers and Mathematics with Applications, Vol. 72, pp. 1565 - 1575 (2017).

Nicaise and **C. Xenophontos**, *An hp FEM for singularly perturbed transmission problems*, J. Comp. Math., Vol, 35, pp. 152 - 168 (2017).

**C. Xenophontos**,

*Robust exponential convergence of hp FEM in balanced norms for reaction diffusion problems*, Calcolo. Vol. 53, No. 1, pp. 105 – 132 (2016).

Constantinou and **C. Xenophontos**, *Finite element analysis of an exponentially graded mesh for singularly perturbed problems*, Computational Methods in Applied Mathematics, Vol. 15, No. 2, pp. 135 – 143 (2015).

Nicaise and **C. Xenophontos**, *Convergence analysis of an hp Finite Element Method for singularly perturbed transmission problems in smooth domains*, Numerical Methods for PDEs Vol. 29, Issue 6, pp. 2107 - 2132 (2013).

**C. Xenophontos**and L. Oberbroeckling,

*Analytic regularity for a singularly perturbed system of reaction-diffusion equations with multiple scales*, Advances in Computational Mathematics, Vol. 39, pp. 367 - 394 (2013).

Nicaise and **C. Xenophontos**, *Robust approximation of singularly perturbed delay differential equations by the hp finite element method*, Comp. Meth. Appl. Math., Vol. 13, pp. 21 - 37 (2013).

**C. Xenophontos**and L. Oberbroeckling,

*Robust exponential convergence of hp-FEM for singularly perturbed systems of reaction-diffusion equations with multiple scales*, IMA J. Num. Anal., Vol. 33., No 2, pp. 609 - 628, (2013).

Christodoulou, M. Elliotis, **C. Xenophontos** and G. Georgiou, *Analysis of the singular function boundary integral method for a biharmonic problem with one boundary singularity*, Numer. Meth. PDEs, Vol. 28, No 3, pp 749 – 767 (2012).

**C. Xenophontos**,

*An enriched subspace finite element method for convection-diffusion problems,*International Journal of Numerical Analysis and Modeling, Vol. 7, No. 3, pp. 477 - 490 (2010).

**Xenophontos**, *The use of curved elements in the finite element approximation of thin plates by high order p and hp methods*, Journal of Scientific Computing, Vol. 27, pp. 465-476 (2006).

**Xenophontos**, M. Elliotis and G. Georgiou, *The singular function boundary integral method for elliptic problems with singularities*, SIAM Journal of Scientific Computing, Vol. 28, No 2., pp. 517-532 (2006).

**C. Xenophontos**,

*An analytical method for linear elliptic PDEs and its numerical implementation*, Journal of Computational and Applied Mathematics, Vol. 167, No. 2 , pp. 465-483 (2004).