1. Castelli, L., Pesenti, R., Ukovich, W., in press. A classification of DEA models when the internal structure of the Decision Making Units is considered, Annals of Operations Research.
2. Measuring the efficiency of decision making units;Charnes;European Journal of Operational Research,1978
3. Additive efficiency decomposition in two-stage DEA;Chen;European Journal of Operational Research,2009
4. Productivity and intermediate products: A frontier approach;Färe;Economics Letters,1996
5. Network DEA;Färe;Socio-Economic Planning Sciences,2000