Wen-Jer Chang Yi-Lin Yeh Wei Chang Variance constrained fuzzy control for observer-based T-S fuzzy models with minimizing auxiliary performance index. 59-69 2006 17 Journal of Intelligent and Fuzzy Systems 1 http://iospress.metapress.com/openurl.asp?genre=article&issn=1064-1246&volume=17&issue=1&spage=59 db/journals/jifs/jifs17.html#ChangYC06