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Efficiency measurement in network industries : application to the Swiss railway companies
Farsi, Mehdi, (2005)
Farsi, Mehdi, (2004)
The profitability of Britain's early railways
Arnold, A. J., (2000)
The cost structure of the Swiss private railways
Filippini, Massimo, (1992)
Inefficiency in a regulated industry : the case of the Swiss regional bus companies
Towards an economic theory of barriers to communication
Maggi, Rico, (1989)