Coelli T and S Perelman (1999). “Comparison of Parametric and Non-Parametric Distance Functions: With Application to European Railways.” EJOR 117(2): 326-339.

Coelli T and S Perelman (1999). “Comparison of Parametric and Non-Parametric Distance Functions: With Application to European Railways.” EJOR 117(2): 326-339.

Leave a Reply