@techreport{HarrodSchlechte2013, author = {Steven Harrod and Thomas Schlechte}, title = {A Direct Comparison of Physical Block Occupancy Versus Timed Block Occupancy in Train Timetabling Formulations}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {13-18}, language = {eng}, year = {2013} }