Venkataraman, K. A., K. Kanthavel, and B. Nirmal Kumar. “Investigations of Response Time Parameters of a Pneumatic 3/2 Direct Acting Solenoid Valve Under Various Working Pressure Conditions”. Engineering, Technology & Applied Science Research, Vol. 3, no. 4, Aug. 2013, pp. 502-5, https://etasr.com/index.php/ETASR/article/view/360.