Twaij, B. A. A.-R. ., D. M. S. . Mashkour, and D. K. . Al-Hakeim. “Study and Determination of Aryl Hydrocarbon Receptor With Some Trace Elements in Fuel Filling Station Workers”. Journal of Petroleum Research and Studies, vol. 10, no. 4, Dec. 2020, pp. 233-51, doi:10.52716/jprs.v10i4.380.