1. Bergantino, A.S. (2002) The European Commission approach to port policy: Some open issues. International Journal of Transport Economics XXIX (3): 337–379.
2. Bichou, K. and Gray, R. (2005) A critical review of conventional terminology for classifying seaports. Transportation Research Part A 39: 75–92.
3. Brooks, M.R. (1990) Ocean carrier selection criteria in a new environment. Logistics and Transportation Review 26: 339–355.
4. Chasco, C. and Vicéns, J. (1998) Spatial interaction models applied to the design of retail trade areas. 38th Congress of the European Regional Science Association. Vienna, Austria: Wirtschaftuniversität.
5. D’Este, G.M. (1992) Carrier selection in a ro/ro ferry trade. Part 2. Conceptual framework for the decision process. Maritime Policy and Management 19 (2): 127–138.