TY - RPRT TI - Multigrid block preconditioning for a coupled system of partial differential equations modeling the electrical activity in the heart. AU - J Sundnes AU - G T Lines AU - K A Mardal AU - A Tveito PY - 2002 DO - 10.1080/1025584021000025023 UR - https://pubmed.ncbi.nlm.nih.gov/12468421/ ID - 12468421 ER -