A. H. El-Mubarak, Rushdi, A. I., Al-Mutlaq, K. F., Bazeyad, A. Y., Simonich, S. L. Massey, and Simoneit, B. R. T.,
“Occurrence of High Levels of Persistent Organic Pollutants (POPs) in Particulate Matter of the Ambient Air of Riyadh, Saudi Arabia”,
Arabian Journal for Science and Engineering, vol. 40, no. 1, pp. 81 - 92, 2015.