6Charnes Abraham, William Wager Cooper, Susan X Li. Using Data Envelop- ment Analysis to Evaluate Efficiency in the Economic Performance of Chinese Cities [ J ]. Socio - Economic Planning Sciences, 1989, (23) : 325 - 344.
7Fare R, Grosskopf S, Lovell C A K, et al. Multilateral Productivity Compar- isons When Some Outputs Are Undesirable:A Nonparametric Approach [ J]. The Review of Economics and Statistics, 1989,7( 1):90- 98.
8Charnes A, Cooper W W, Rhodes E. Short Communication : Measuring Effi- ciency of Decision Making Units [ J ]. European Journal Operational Re- search, 1979,3 (4) : 339.
9Charnes A, Cooper W W, Rhodes E. Measuring the Efficiency of Decision Making Units [ J ]. European Journal of Operational Research, 1978,2 (6) : 429 - 444.