Khairudin, Norhazlin, et al. “Enhancing Humidity Performance: Effect of Electrode Material on Electrochemical Reduced Graphene Oxide (ERGO) Humidity Sensor”. International Journal of Integrated Engineering, vol. 14, no. 3, June 2022, pp. 215-28, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/10399.