Chang KP, K Pei-Hua and Y Yeah-Yuh Guh (1995). “Piecewise Loglinear Frontiers and Log Efficiency Measures.” Computer and Operations Research 22: 1031-1037.

Chang KP, K Pei-Hua and Y Yeah-Yuh Guh (1995). “Piecewise Loglinear Frontiers and Log Efficiency Measures.” Computer and Operations Research 22: 1031-1037.

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