E, Olatunji, Toyin, and Adegbite, Tajudeen A. “Investment in Fixed Assets and Firm Profitability: Empirical Evidence from the Nigerian Banking Sector”. Asian Journal of Social Sciences and Management Studies, vol. 1, no. 3, Dec. 2014, pp. 78-82, https://www.asianonlinejournals.com/index.php/AJSSMS/article/view/442.