Chunyang Feng Hai Zhou Changhao Yan Jun Tao Xuan Zeng Provably good and practically efficient algorithms for CMP dummy fill. 539-544 2009 DAC http://doi.acm.org/10.1145/1629911.1630052 conf/dac/2009 db/conf/dac/dac2009.html#FengZYTZ09