1. Track maintenance to match the traffic task;Bell,1990
2. Infrastructure management under uncertainty;Ben-Akiva;ASCE Journal of Transportation Engineering,1993
3. The solution of a railway locomotive scheduling problem;Booler;Journal of the Operational Research Society,1980
4. International Performance Indicators: Rail Freight Update;Bureau of Industry Economics,1993
5. Adequacy of transport infrastructure: rail;Bureau of Transport and Communications Economics,1995