8Necmi Kemal Avidran. The Evidence on Effciency Gains: The Rote of Mergers and the Benefits to the Public,[J]. Journal d Banking & Finance, 1999,(23) :991 - 1013.
9Philip Molyneux. Efficiency in European Banking.Garland Publishing[M]. Inc. New York & London,1997.
10Andrew C,Woahington. The Determinants of Non- bank Financial Institution Efficiency: a Stochastic Cost Frontier Approach [ J ]. Applied Financial Economics, 1998, (8) :279 - 287.