Cantos P, JM Pastor and L Serrano (1999). “Productivity, Efficiency and Technical Change in the European Railways: A Non-Parametric Approach.” Transportation 26(4): 337-357.

Cantos P, JM Pastor and L Serrano (1999). “Productivity, Efficiency and Technical Change in the European Railways: A Non-Parametric Approach.” Transportation 26(4): 337-357.

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