@ARTICLE{
author={Jovanovic Bosko S,Koleva Miglena N,Vulkov Lubin G},
year={2011},
title={Convergence of a FEM and two-grid algorithms for elliptic problems on disjoint domains},
journal={JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS},
volume={236},
number={3},
pages={364-374},
document_type={Article},
}