5A CHARNES, W W.COOPER, E RHODES. Measming the efficien- cy of efficiency of decision making units [ J ]. European Journal of Operational Research, 1978 (2) : 429 -444.
6R D BANKER, A CHARNES, W W COOPER. Some models for esti- mating technical and scale inefficiencies in data envelopment analysis [J]. Management Science, 1984 (9) : 1078 -1092.
