4Charnes, A. , W. W. Cooper andE. Rhodes. Measuring the Efficiency of Decision Making Units [ J ]. European Journal of Operational Research, 1978,2 ( 6 ).
5Charnes, A, W. W. Cooper and R. M. Thrall. A Structure for Classifying and Characterizing Effciency and In- effciency in Data Envelopment Analysis[ J]. The Journal of Productivity Analysis, 1991,2 (3).
6Green,R. H, J. R. Doyle and W. D. Cook. Efficiency Bounds in Data Envelopment Analysis [ J ]. European Journal of Operational Research, 1996.
7Shi Peng and Frees Edward W. Long-tail longitudinal modeling of insurance company expenses [ J ]. Insurance mathematics & Economics ,2010,47 ( 3 ).
8Barros Carlos Pestana, Nektarios Milton and Assaf A. Efficiency in the Greek insurance industry[ J ]. Europe- an Journal of Operational Research ,2010,5 (2).
