Roman M and M Roman (2000). “Data Development Analysis Method in Labour Efficiency Analysis.” Economic Computation and Economic Cybernetics Studies and Research 34(1-4): 79-89.

Romano E (1999). “Accounting for Environmental Influences in Stochastic Frontier Models: With Application to International Airlines.” JPA 11(3): 251-273.

Rosen D, C Schaffnit and JC Paradi (1998). “Marginal Rates and Two-Dimensional Level Curves in DEA.” JPA 9(3): 205-232 MAY.

Robinson PM (1991). “Consistent Nonparametric Entropy-Based Testing.” Review of Economic Studies 5: 437-453.

Rodriguez-Diaz JA, E Camacho-Poyato and R Lopez-Luque (2004). “Application of Data Envelopment Analysis to Studies of Irrigation Efficiency in Andalusia.” J Irrigation and Drainage Engineering 130(3): 175-183.

Rogers JW and GE Louis (2007). “A Financial Resource Allocation Model for Regional Water Systems.” International Transactions in Operational Research 14(1): 25-37.

Rogowski G (1999). “Application of Bank Efficiency Analysis to Bank Strategic Management. 1. Methodology.” Badania Operacyjne i Decyzje(1): 69-89.

Roll Y and WD Cook (1993). “Partial Efficiencies in Data Envelopment Analysis.” Socio-Econ Plan Sci 2: 171-179.

Roll Y, WD Cook and B Golany (1991). “Controlling Factor Weights in Data Envelopment Analysis.” IIE Transactions 23(1): 2-9.

Roll Y and B Golany (1993). “Alternate Methods of Treating Factor Weights in DEA.” Omega 21(1): 99-109.