Orji , A., S. O. Ogwu, P. N. Mba, and O. I. A. Orji. “Energy Demand and Cooking Energy Cost in an Oil-Rich Economy: A New Evidence From Nigeria”. Studia Universitatis Vasile Goldiș Arad, Seria Științe Economice, Vol. 31, no. 1, Jan. 2021, pp. 1-21, https://publicatii.uvvg.ro/index.php/studiaeconomia/article/view/663.