Yiyu Shi Wei Yao Jinjun Xiong Lei He Incremental and on-demand random walk for iterative power distribution network analysis. 185-190 2009 ASP-DAC http://doi.acm.org/10.1145/1509633.1509689 conf/aspdac/2009 db/conf/aspdac/aspdac2009.html#ShiYXH09