Yacob, S., Amran Md Ali, M., Ahsan, Q., Arifin, N., & Ali, R. (2018). A brief review of grey fuzzy logic technique research progression from 2010 to 2016. International Journal of Engineering and Technology, 7(2.29), 41-42. https://doi.org/10.14419/ijet.v7i2.29.13125