Determination of all stabilizing fractional-order PID controllers. - Yung K. Lee; John M. Watkins (ACC, 2011)

Determination of all stabilizing fractional-order PID controllers that satisfy a weighted sensitivity constraint. - Yung K. Lee; John M. Watkins (CDC, 2012)

Determination of all stabilizing fractional-order PID controllers that satisfy a robust performance constraint. - Yung K. Lee; John M. Watkins (ACC, 2013)