Sukkarnkha, P., and C. Panjapornpon. “Two-Degree-of-Freedom Controller Design for Uncertain Processes Using Input/Output Linearization Control Technique”. ASEAN Journal of Chemical Engineering, Vol. 11, no. 1, Dec. 2011, pp. 16-21, https://journal.ugm.ac.id/v3/AJChE/article/view/8076.