Ahmed Z. Analyzing Time Series, Forecasting Future Revenues and Expenditures - An Analytical Study of the Data of A Sample of Telecommunications Companies for the Period (2012-2021). TANRA [Internet]. 2023 Sep. 1 [cited 2025 Sep. 7];42(139):308-26. Available from: https://tanmiyat.uomosul.edu.iq/index.php/tanmiyat/article/view/29493