Nan Xie Ping Chen Lei Zhao Bin Xia Delay-Dependent Robust Reliable Guaranteed Cost Control for Nonlinear Systems with Time-Varying State Delays. 724-729 2008 RAM http://dx.doi.org/10.1109/RAMECH.2008.4681405 conf/ram/2008 db/conf/ram/ram2008.html#XieCZX08