Auto-tuning of PID controllers via extremum seeking. - Nick J. Killingsworth; Miroslav Krstic (ACC, 2005)

Extremum Seeking Tuning of an Experimental HCCI Engine Combustion Timing Controller. - Nick J. Killingsworth; Salvador M. Aceves; Daniel L. Flowers; Miroslav Krstic (ACC, 2007)

HCCI Engine Combustion-Timing Control: Optimizing Gains and Fuel Consumption Via Extremum Seeking. - Nick J. Killingsworth; Salvador M. Aceves; Daniel L. Flowers; Francisco Espinosa-Loza; Miroslav Krstic (IEEE Trans. Control. Syst. Technol., 2009)