References
- Dullaert , W. , Jourquin , B. A. M. & Polak , J. B. ( 2003 ) Across the Border. Building Upon a Quarter Century of Transport Research in the Benelux , 316 p ( Antwerp : De Boeck ).
- Dullaert , W. , Vernimmen , B. & Witlox , F. ( 2005 ) Proceedings of the BIVEC-GIBET Transport Research Day 2005 – Part II , 493 p ( Hasselt : Hasselt University ).
- Witlox , F. , Dullaert , W. & Vernimmen , B. ( 2005 ) Proceedings of the BIVEC-GIBET Transport Research Day 2005 – Part I , 437 p ( Hasselt : Hasselt University ).