Xu He Sheqin Dong Yuchun Ma Xianlong Hong Simultaneous buffer and interlayer via planning for 3D floorplanning. 740-745 2009 ISQED http://dx.doi.org/10.1109/ISQED.2009.4810385 conf/isqed/2009 db/conf/isqed/isqed2009.html#HeDMH09