Wudhichai Assawinchaichote Sing Kiong Nguang Fuzzy H<sub>∞</sub> output feedback control design for singularly perturbed systems with pole placement constraints: an LMI approach. 361-371 2006 14 IEEE T. Fuzzy Systems 3 http://doi.ieeecomputersociety.org/10.1109/TFUZZ.2006.876328 db/journals/tfs/tfs14.html#AssawinchaichoteN06