F. Abed, Mahmood, et al. “Health Risk Assessment of Polycyclic Aromatic Hydrocarbons in Surface Soils at North Baiji City, Iraq”. Iraqi Journal of Science, vol. 56, no. 4A, Feb. 2023, pp. 2927-38, https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/9529.