Kareem, S. D. ., Sunkanmi, O. A. ., Kehinde, A. . and Samad, L. A. (2017) “Pollution Tax Under Imperfect Competition and Air Transport in a Domestic Economy”, International Journal of Business, Economics and Management, 4(3), pp. 44–51. doi: 10.18488/journal.62.2017.43.44.51.