4Allen N. Berger, John H. Leusner, John J. Mingo. The efficiency of bank branches. Journal of Monetary Economics, 1997,(40):141-162.
5D. higher, C.A.K. Lovell and P. Schmidt. Formulation and estimation of stochastic frontier production function models, Journal of Econometrics,1977,(6):21-37.
7Gilbert R. 1984. "Bank Market Structure and Competition.A Survey". Journal of Money, Credit and Barking 16.
8J S Bain, 1956, "Barriers to New Competition . Their Character and Consequences in Manufacturing Industrial." Cambridge, Mass . Harvard University Press.
9J S Bain, 1959, "Industrial Organization". New York . Wiley.
10Keeley M. 1990." Deposit Insurance, Risk and Market Power in Banking". American Economic Review 80.
