Mu’azu, Bilyaminu, and Ahmed Malumfashi Halliru. “Nexus Between Foreign Direct Investments, Shadow Economy and CO2 Emissions in Nigeria”. UMYUK Journal of Economics and Development (UJED), vol. 1, no. 1, June 2024, pp. 77-88, https://ujed.umyu.edu.ng/index.php/ujed/article/view/8.