↑ Ostermann S. 10ff.
↑ Ostermann S. 8
↑ mainportdelta.org: Port of Rotterdam
↑ Ans Kolk und Mark van der Veen: "Dilemmas of Balancing Organizational and Public Interests: How Environment Affects Strategy in Dutch Main Ports" in: European Managemet Journal Vol. 20, No. 1 pp.45-54 2002
↑ Port of Rotterdam: Petro Chemical Cluster
↑ http://www.rotterdam.nl/Rotterdam/Internet/Overig/rdm/ABC-IRIS/COSkerncijfers2006.pdf