*Interative schemes for non-symmetric and indefinite elliptic boundary
value problems * (with Z. Leyk and J. E. Pasciak).
*Math. Comp. 60 (1993) 1-22*

*Interpolation between Sobolev spaces in Lipschitz domains with an application to multigrid theory.*
*Math. Comp. 64 (1995) 1359--1365*

*Some estimates for a weighted L^2 projection *(with J. Xu).
*Math. Comp. 56 (1991) 463-476 *

*A least-squares approach based on a discrete minus one inner product for first order systems* (with R. D. Lazarov and J. E. Pasciak).
*Math. Comp. 66 (1997) pp.935-955*

*Least-squares methods for Stokes equations based on a discrete minus one inner product * (with J. E. Pasciak).
*Jour. Comput. and Appl. Math. 74 (1996) pp. 155--173 *

*Iterative techniques for time dependent Stokes problems *
(with J. E. Pasciak).
*The International Journal on Computers and Mathematics with Applications 33 (1997) pp. 13-30*

*Analysis of the inexact Uzawa algorithm for saddle point problems *
(with J. E. Pasciak and A. T. Vassilev).
*SIAM Numer. Anal. 34 (1997) pp. 1072-1092*

*Uniform convergence estimates for multigrid V-cycle algorithms with
less than full elliptic regularity* (with J. E. Pasciak).
*Domain Decomposition methods in science and Engineering,
A. Quarteroni, J. Periaux, Y. A. Kuznetsov and O. B. Widlund, Eds,
Contemporary Mathematics Series \#157
Am. Math. Soc. (1994) 17--26*

*Uniform convergence of multigrid V-cycle iterations for indefinite and nonsymmetric problems *(with D.Y. Kwak and J.E. Pasciak).
*SIAM J. Num. Anal. 31 (1994) 1746--1763*

*The analysis of multigrid algorithms for cell centered finite difference
methods *(with R. E. Ewing, J. E. Pasciak and J. Shen).
*Adv. in Comp. Math. 5 (1996) pp.15-29*

*New estimates for multilevel algorithms including the V-cycle *
(with J. E. Pasciak) *Math. Comp.
60 (1993) 447-471 *

*Analysis of non-overlapping domain decomposition algorithms with inexact
solves *(with J. E. Pasciak and A. T. Vassilev).
*Math. Comp. 67 (1998) pp. 1-19*

*A finite element method for interface problems in domains with smooth
boundaries and interfaces *(with J. T. King).
*Advances in Comp. Math. 6 (1996) pp.109-138
*

*A subspace preconditioning algorithm for eigenvalue/eigenvector
computation *(with A. V. Knyazev and J. E. Pasciak).*Advances in
Comp. Math. 6 (1996) pp.159-189*

*Multigrid methods for the biharmonic problem discretized by conforming C^1 finite elements on nonnested meshes *
(with X. Zhang).*Numer. Funct. Anal. and Optimiz. 1 (1995) pp. 835--846 *

*The Analysis of multigrid algorithms for pseudo-differential operators of order minus one *
(with Z. Leyk and J. E. Pasciak).
*Math. Comp. 63 (1994) pp. 461-478 *

*Two-Level preconditioners for 2m'th order elliptic
finite element problems *
(with J. E. Pasciak and X. Zhang). *East-West J. Numer. Math. 4 (1996)
pp. 99-120 *

* A negative norm least squares method for Reissner-Mindlin plates*
(with T. Sun). *Math. Comp. 67 (1998) pp.901-916*

* A locking -free finite element method for Naghdi shells *
(with T. Sun).*Journal of Computational and Applied Mathematics 89 (1997) pp.119-133 *

*Uniform Convergence of the Multigrid V-Cycle for an Anisotropic Problem*
(with X. Zhang).*Math. Comp. 70 (2001) pp. 453-470*

*Least-Squares for Second Order Elliptic Problems*
(with R. D. Lazarov and J. E. Pasciak). *Comput. Methods in
Appl. Mech. Engrg. 152 (1998) pp. 195-210*

*Inexact Uzawa Algorithms for Nonsymmetric Saddle Point Problems *
(with J. E. Pasciak and A. T. Vassilev). *Math. Comp. 69 (2000) pp.667-689*

*Computational scales of Sobolev norms with application to
preconditioning* (with J. E. Pasciak and P. S. Vassilevski).
*Math. Comp. 69 (2000) pp. 463-480 *

*On the Stability of the $L^2$ projection in $H^1$* (with J. E. Pasciak and O. Steinbach).
*Math. Comp. 71 (2002) pp. 147-156 *

*Least-squares methods for linear elasticity based on discrete minus
one inner product * (with R. D. Lazarov and J. E. Pasciak)
*Comp. Meth. Appl. Mech. Engrg. 152 (2001) pp. 520-543 *

*Using finite element tools in proving shift theorems
for elliptic boundary value problems*(with J. E. Pasciak, and
C. Bacuta)

*Journal of Computational Linear Algebra. *

*New interpolation results and applications to finite element methods for elliptic boundary value problems*
(with C. Bacuta and J. E. Pasciak).*East-West J. Numer. Math. 3 (2001) 179-198.*

*A proof of the inf-sup condition for the Stokes equations on Lipschitz domains.*
* M^3 AS 13 (2003) pp.361-371 *

*Regularity estimates for elliptic boundary value problems in Besov
spaces* (with C. Bacuta and J. Xu).
* Math. Comp.72 (2003) pp.1577-1595 *

*Shift theorems for the biharmonic Dirichlet problem* (with
C. Bacuta and J. E. Pasciak).
* (preprint) *

*Regularity estimates for elliptic boundary
value problems with smooth data on polygonal domains* (with C. Bacuta and J. Xu).
* (preprint) *

*A new approximation technique for div-curl systems* (with J. E. Pasciak).
* Math. Comp. 73 (2004) pp.1739-1762 *

*Regularity estimates for solutions of the equations of linear elasticity in
convex plane polygonal domains* (with C. Bacuta).
* ZAMP(to appear) *

*The approximation of the Maxwell eigenvalue problem using a least
squares method* (with T. Kolev and J. E. Pasciak).
* Math. Comp.74 (2005) pp.1575-1598 *

*A least-squares method for the time-harmonic Maxwell equations* (with T. Kolev and J. E. Pasciak).
* J. Numer. Math. 13,(2005) pp.237-320 *

*Analysis of a finite PML
approximation for the three dimensional time-harmonic Maxwell and
acoustic scattering
problems* (with J. E. Pasciak).
* Math. Comp.(to appear) *

*A note on
the existence and uniqueness of solutions of frequency domain
elastic wave problems:
{ \it{a priori}} estimates in $\bH^1$.
* (with J. E. Pasciak).
* Math. Comp.(to appear) *

*Analysis of a finite PML
approximation for the three dimensional elastic wave scattering problem
problem
* (with J. E. Pasciak and D.Trenev).
* (to appear) *

*Analysis of a finite element PML
approximation for the three dimensional time harmonic Maxwell scattering problem
problem
* (with J. E. Pasciak).
* (to appear) *