“The Numerical Methods to Estimation the Missing Values of Data in Time Series”. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ) 37, no. 1 (October 12, 2021): 116–144. Accessed June 26, 2026. https://jrucs.iq/index.php/JAUCS/article/view/237.