Chih-Hung Lee Chin-Hung Su Shih-Hsu Huang Chih-Yuan Lin Tsai-Ming Hsieh Floorplanning with clock tree estimation. 6244-6247 2005 conf/iscas/2005 ISCAS (6) http://dx.doi.org/10.1109/ISCAS.2005.1466067 db/conf/iscas/iscas2005-6.html#LeeSHLH05