G. Quaden, “Efficiency and Stability in an Evolving Financial System,” 2004. www.bub.be/Sg/En/Contact/pdf/2004/spo40517an.pdf
 S. C.Valverde, R. L. del Pasto and F. R. Fernandez, “Banks, Financial Innovations and RegionalGrowth,” 2004. www.ugr.es/~franrod/ingrowth04.pdf
 E. A. Onwioduokit and P. Adamu, “Financial Liberalization in Nigeria: An Assessment of Relative Impact,” In: Nigerian Economic Society, Benefits and Costs of Economic Reforms in Nigeria. Selected Papers for the 2005 Annual Conference of Nigerian Economic Society, 2005.
 C. I. Enendu, “Determinants of Commercial bank Interest Rate Spreads in a Liberalized Financial System: Empirical Evidence form Nigeria 1989-2000,” Economic and Financial Review, Vol. 41, No 1, 2003.
 L. Angbazo, “Commercial bank Net Interest Margins, Default Risk, Interest-Rate Risk, and Off-Balance Sheet Banking,” Journal of banking and Finance, Vol. 21, No. 1, 1997, pp. 55- 87. doi:10.1016/S0378-4266(96)00025-8
 A. Saunders and L. Schumacher, “The determinants of Bank Interest rate Margins: An International Study,” Journal of International Money and Finance, Vol. 19, No. 6, pp. 813-832. doi:10.1016/S0261-5606(00)00033-4
 K.P. Wong, “On the Determinants of Bank Interest Margins under Credit and Interest Rate Risks,” Journal of Banking and Finance, Vol. 21, No.2, 1997, pp. 251-271. doi:10.1016/S0378-4266(96)00037-4
 T. Ho and A. Saunders, “The Determinants of Bank Interest Margins: Theory and Empirical Evidence,” Journal of Financial and Quantitative Analysis, Vol. 16, No. 4, 1981, pp. 581-600. doi:10.2307/2330377
 P. Martinez and M. S. Mody, “How Foreign Participation and Market Concentration Impact Bank Spreads: Evidence from Latin America,” Journal of Money, Credit and Banking, Vol. 36, No. 3, pp. 511-537. doi:10.1353/mcb.2004.0048
 D. Tennant and A. Folawewo, “Macroeconomic and Market Determinants of Banking Sector Interest Rate Spread: Empirical Evidence from Low and Middle Income Countries,” Department of Economics, University of West Indies, Mona, Mimeo.
 M. Arellano and S. R. Bond, “Some Tests of Specification for Panel Data: Monte Carlo Evidence and an Application to Employment Equations,” Review of Economic Studies, Vol. 58, No. 2, 1991, pp. 277-297. doi:10.2307/2297968