Chanfreau, Sebastien, Liang Nian He, and Bing Yu. 2011. “Electrochemical Behaviour Of Ferrocene/Ferricinium Redox System In Pure And CO2 Saturated [C6MIM][PF6]”. ASEAN Journal of Chemical Engineering 11 (2), 53-58. https://journal.ugm.ac.id/v3/AJChE/article/view/8091.