Mahmud, M. S., Ishak, S., Razali, M. N., Abdul Aziz, M. A., & Musa, M. (2019). Grease Quality Issues on Middle Voltage Switchgear: Corrosivity, Resistivity, Safety and Ageing. IIUM Engineering Journal, 20(1), 216–228. https://doi.org/10.31436/iiumej.v20i1.995