Jing Li Bo Yang Xiaochuan Hu Qing Dong Shigetoshi Nakatake STI stress aware placement optimization based on geometric programming. 209-214 2009 ACM Great Lakes Symposium on VLSI http://doi.acm.org/10.1145/1531542.1531594 conf/glvlsi/2009 db/conf/glvlsi/glvlsi2009.html#LiYHDN09