O., Abulude F., Fagbayide S. D., Akinnusotu A., Elisha J. J., and Makinde O. E. 2019. “Particulate Matter and Source Identification: A Case Study of Nigeria”. Engineering and Applied Science Research 46 (2):151-69. https://ph01.tci-thaijo.org/index.php/easr/article/view/153078.