Lozano-Vivas A and DB Humphrey (2002). “Bias in Malmquist Index and Cost Function Productivity Measurement in Banking.” Int J Prod Econ 76(2): 177-188.

Lozano-Vivas A and DB Humphrey (2002). “Bias in Malmquist Index and Cost Function Productivity Measurement in Banking.” Int J Prod Econ 76(2): 177-188.

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