“Forecasting Sales of Premium Oil Fuel, Pertalite, Pertamax, Pertamax Turbo and Bio Solar Using the Method Exponential Moving Average (EMA) (case Study: Klampis Gas Station Surabaya)”, J. Electr. Eng. Comput. Sci., vol. 5, no. 1, pp. 789–794, Jun. 2020, doi: 10.54732/jeecs.v5i1.104.