Aziz, A. A. ., and K. O. Hasan. “Comparison Between GVM and Wavelet GVM Model to Forecast Monthly Electricity Demand of Erbil Governorate”. Polytechnic Journal of Humanities and Social Sciences, vol. 4, no. 1, Feb. 2023, pp. 9-15, doi:10.25156/ptjhss.v4n1y2023.pp9-15.