Martin Fischer Heinz K. Dirks Multigranular parallel algorithms for solving linear equations in VLSI circuit simulation. 728-736 2004 23 IEEE Trans. on CAD of Integrated Circuits and Systems 5 http://doi.ieeecomputersociety.org/10.1109/TCAD.2004.826549 db/journals/tcad/tcad23.html#FischerD04