Hutagalung, A. A., and R. F. Sari. “Forecasting Indihome Users By Using Trigonometrics, Box Cox, Transformation, Arma Error, Trend, And Seasonal (TBATS) Methods”. Mathline : Jurnal Matematika Dan Pendidikan Matematika, vol. 9, no. 1, Feb. 2024, pp. 243-56, doi:10.31943/mathline.v9i1.579.