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Efficiency of public passenger transport by rail in larger cities : European biased perspective
Hilmola, Olli-Pekka, (2010)
Role of location in railway sector efficiency
Hilmola, Olli-Pekka, (2011)
Global railway passenger transports : efficiency analysis from period of 1980-2004
Hilmola, Olli-Pekka, (2009)