“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 ), vol. 52, no. 2, Dec. 2022, pp. 32-46, https://doi.org/10.55562/jrucs.v52i2.540.