Porembski M, K Breitenstein and P Alpar (2005). “Visualizing Efficiency and Reference Relations in Data Envelopment Analysis with an Application to the Branches of a German Bank.” JPA 23(2): 203-221.

Porembski M, K Breitenstein and P Alpar (2005). “Visualizing Efficiency and Reference Relations in Data Envelopment Analysis with an Application to the Branches of a German Bank.” JPA 23(2): 203-221.

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