Olesen OB and NC Petersen (1995). “Chance Constrained Efficiency Evaluation.” Management Science 41(3): 442-457.

Olesen OB and NC Petersen (1995). “Comment on Assessing Marginal Impact of Investment on the Performance of Organisational Units.” Int J Prod Econ 39(1/2): 162-163.

Olesen OB and NC Petersen (1995). “Incorporating Quality into Data Envelopment Analysis: A Stochastic Dominance Approach.” Int J Prod Econ 39(1-2): 117-135.

Olesen OB and NC Petersen (1996). “Indicators of Ill-Conditioned Data Sets and Model Misspecification in Data Envelopment Analysis: An Extended Facet Approach.” Management Science 42(2): 205-219.

Olesen OB and NC Petersen (1996). “A Presentation of Gams for DEA.” Computer and Operations Research 23(4): 323-339.

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 (2002). “The Use of Data Envelopment Analysis with Probabilistic Assurance Regions for Measuring Hospital Efficiency.” JPA 17(1-2): 83-109.

Olesen OB and NC Petersen (2003). “Identification and Use of Efficient Faces and Facets in DEA.” JPA 20(3): 323-360.

Oliveira MA and C Santos (2005). “Assessing School Efficiency in Portugal Using FDH and Bootstrapping.” Appl Econ 37(8): 957-968.

Oduol JBA, K Hotta, S Shinkai and M Tsuji (2006). “Farm Size and Productive Efficiency: Lessons from Smallholder Farms in Embu District, Kenya.” J Faculty of Agriculture, Kyushu University 51(2): 449-458.