Jiayi Liu Sheqin Dong Xianlong Hong Yibo Wang Ou He Satoshi Goto Symmetry constraint based on mismatch analysis for analog layout in SOI technology. 772-775 2008 ASP-DAC http://dx.doi.org/10.1109/ASPDAC.2008.4484055 conf/aspdac/2008 db/conf/aspdac/aspdac2008.html#LiuDHWHG08