1. The history of the International North Sea Conferences;Ehlers,1990
2. Ministerial Declaration of the Third International Conference on the Protection of the North Sea, adopted at The Hague, 8 March 1990, hereinafter Third Declaration.
3. Recommendation 89/1 of 22 June 1989 on precautionary action, Paris Commission Procedures and Decisions Manual, pp C 14/89-E, 1/2/-2/2.