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The development of the communications and transportation infrastructure of Argentina's more advanced economy : 1850 - 1914
DeClercq, Hugo, (1973)
En disaggregert ettermodell for offentlig transport i MODAG/MSG
Magnussen, Knut A., (1991)
The performance of public enterprises : a comparative efficiency study of railways and postal services
Perelman, Sergio, (1987)
Comparative performance study of postal services : a productive efficiency approach
Perelman, Sergio, (1994)
Scale economies and performance in the French insurance industry
Fecher, Fabienne, (1991)