1. Abiola, J., & Asiweh, M. (2012). Impact of tax administration on government revenue in a developing economy — A case study of Nigeria. International Journal of Business and Social Science, 3(8), 99–113. https://asset-pdf.scinapse.io/prod/2291847727/2291847727.pdf
2. Adhikari, K. G. (2020). Contribution of income tax to GDP in Nepal. Journal of Management, 3(1), 73–84. https://doi.org/10.3126/jom.v3i1.30915
3. Ahmad, S., Sial, M., & Ahmad, N. (2016). Taxes and economic growth: An empirical analysis of Pakistan. European Law Review, 5(2), 16–29. http://doi.org/10.21859/eulawrev-08062
4. Ahmed, Q. M., & Muhammad, S. D. (2010). Determinants of tax buoyancy: Empirical evidence from developing countries. European Journal of Social Sciences, 13(3), 408–414. https://ssrn.com/abstract=1583943
5. Al-Agha, M. (2005). The impact of taxes on the gross domestic product in Sudan during the period (1981–2003) [Master thesis, Sudan University of Science and Technology]. SUST Repository. http://repository.sustech.edu/handle/123456789/8994?show=full