“Using Some of the Nonparametric Smoothing Models to Build An Appropriate Model for Predicting Number of Cases of Covid-19 in Iraq” (2022) Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), 52(2), pp. 32–46. doi:10.55562/jrucs.v52i2.540.