@article{HarrodSchlechte2013, author = {Steven Harrod and Thomas Schlechte}, title = {A Direct Comparison of Physical Block Occupancy Versus Timed Block Occupancy in Train Timetabling Formulations}, journal = {Transportation Research Part E: Logistics and Transportation Review}, volume = {54}, pages = {50 -- 66}, doi = {10.1016/j.tre.2013.04.003}, year = {2013}, }