I. H. Sheikh, N. Naz, R. Haider, F. Hussain, M. F. Alam, M. Nadeem, and M. Arshad. “Contribution to Pollution by Different Types of Vehicles Based on Age and Number: Vehicular Pollution Based on Age of Vehicles”. Pakistan Journal of Science, vol. 76, no. 03, Sept. 2024, pp. 333-40, doi:10.57041/vol76iss03pp333-340.