Fradinata, E. ., S. . Suthummanon, and W. . Suntiamorntut. “Forecasting Determinant of Cement Demand in Indonesia With Artificial Neural Network”. Journal of Asian Scientific Research, vol. 5, no. 7, July 2015, pp. 373-84, doi:10.18488/journal.2/2015.5.7/2.7.373.384.