8Charnes A,Cooper W W,Rhodes E.Measuring the efficiency of decision making units.European Journal of Operational Research,1978(2):429-444.
9Banker R D,Charnes A,Cooper W W.Some models forestimating technical and scale inefficiencies in data envelopment analysis.Management Science,1984,30(9):1078-1092.
10Malmquist S.Index numbers and indifference surfaces.Trabajos de Estatistica,1953(4):209-242.
