Olesen OB and NC Petersen (1999). “Probabilistic Bounds on the Virtual Multipliers in Data Envelopment Analysis: Polyhedral Cone Constraints.” JPA 12(2): 103-133.

Olesen OB and NC Petersen (1999). “Probabilistic Bounds on the Virtual Multipliers in Data Envelopment Analysis: Polyhedral Cone Constraints.” JPA 12(2): 103-133.

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