Tan Yan Qing Dong Yasuhiro Takashima Yoji Kajitani How does partitioning matter for 3D floorplanning? 73-78 2006 conf/glvlsi/2006 ACM Great Lakes Symposium on VLSI http://doi.acm.org/10.1145/1127908.1127928 db/conf/glvlsi/glvlsi2006.html#YanDTK06