1. Baltensperger, E., and J. Dermine (1990): “European Banking: Prudential and Regulatory Issues”, in: European Banking in the 1990s, ed.: J. Dermine, Blackwell, London.
2. Baumol, W. J. (1977): “On the Proper Cost Tests for Natural Monopoly in a Multiproduct Industry”, American Economic Review 67, pp. 809 - 822.
3. Baumol, W. J. (1982): “Contestable Markets: an Uprising in the Theory of Industry Structure”, American Economic Review 72, pp. 1 - 15.
4. Berger, A. N., D. Hancock and D. B. Humphrey (1993): “Bank Efficiency Derived from the Profit Function”, Journal of Banking and Finance 17, pp. 317 - 347.