Rich, J. H., Nielsen, O. A. and Holm, J. (2002) “Portzone model for Øresundsregionen: – fremskrivning af trafikpotentialet for ny togtunnel mellem Helsingør-Helsingborg”, Proceedings from the Annual Transport Conference at Aalborg University, 9(1). doi: 10.5278/ojs.td.v9i1.4556.