Edeme, R. K. . ., Nkalu, C. N. . ., Azu, B. ., & Nwachukwu, S. C. . (2016). Alternative Specification and Estimation of Tax Revenue-Gross Domestic Product Relationship. Asian Journal of Economic Modelling, 4(3), 134–141. https://doi.org/10.18488/journal.8/2016.4.3/8.3.134.141