Switched control of an electropneumatic clutch actuator using on/off valves. - Hege Langjord; Tor Arne Johansen; Joao P. Hespanhay (ACC, 2008)

Dual-mode switched control of an electropneumatic clutch actuator with input restrictions. - Hege Langjord; Tor Arne Johansen; Christian Bratli (ECC, 2009)

Adaptive Nonlinear Observer for Electropneumatic Clutch Actuator With Position Sensor. - Hege Langjord; Glenn-Ole Kaasa; Tor Arne Johansen (IEEE Trans. Control. Syst. Technol., 2012)