“Studying Some Air Pollutants by Using the Nonlinear Autoregressive Distributed Lags (NARDL) Model” (2024) Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), 54(1), pp. 364–373. doi:10.55562/jrucs.v54i1.606.