W. Javed, A. S. Wexler, G. Murtaza, H. R. Ahmad, and S. M. A. Basra, “SPATIAL, TEMPORAL AND SIZE DISTRIBUTION OF PARTICULATE MATTER AND ITS CHEMICAL CONSTITUENTS IN FAISALABAD, PAKISTAN”, Atmósfera, vol. 28, no. 2, pp. 99–116, Mar. 2015.