Thompson RG, PS Dharmapala and RM Thrall (1993). “Importance for DEA of Zeros in Data, Multipliers, and Solutions.” JPA 4(4): 379-390.
Thompson RG, PS Dharmapala and RM Thrall (1993). “Importance for DEA of Zeros in Data, Multipliers, and Solutions.” JPA 4(4): 379-390.