“Using Some of the Nonparametric Smoothing Models to Build An Appropriate Model for Predicting Number of Cases of Covid-19 in Iraq”. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ) 52, no. 2 (December 31, 2022): 32–46. Accessed April 16, 2026. https://jrucs.iq/index.php/JAUCS/article/view/540.