7Aigner, D., K. Lovell and P. Schmidt, 1977, "Formulation and Estimation of Stochastic Frontier Production Function Models", Journal of Econometrics, 6, 21--37.
8Banker, R.D., Charnes A. and Cooper W.W., 1984, "Some Models for Estimating Technical and Scale Efficiencies in Data Envelopment Analysis", Management Science, 30, 1078--1092.
9Brockett, P. L., Cooper W. W. and Goldenm L. L., 2004, "Evaluating Solvency and Efficiency Performance in U.S. Property Liability Insurance Companies", European Journal of Operational Research, 2, 492--514.
10Charnes Abraham, William Cooper and Edwardo Rhodes, 1978, "Measuring the Efficiency of Decision Making Units", European Journal of Operational Research, 2, 429--444.