On 3 February 1948, two months after the entry into force of the customs convention concluded between Belgium, the Netherlands and Luxembourg (Benelux), the German daily newspaper Frankfurter Rundschau speculates on the chances of success of a possible Scandinavian customs union between Denmark, Norway and Sweden.

Le 14 octobre 1955, le journal La Vie Française évoque les difficultés de coopération entre les pays scandinaves.

On 24 November 1958, the delegations from Denmark, Finland, Norway and Sweden present a Joint Statement which sets out plans for the establishment of Nordic economic cooperation.

On 11 November 1958, the French daily newspaper Le Monde analyses the impact of the proposed Nordic common market, as drawn up by the five Members of the Nordic Council, and outlines in particular Denmark’s special trading position with the Six.

On 4 March 1959, the German daily newspaper Frankfurter Allgemeine Zeitung analyses the situation in the Nordic countries following the breakdown of negotiations for the establishment of a free trade area in December 1958.

On 23 March 1962, representatives from Denmark, Finland, Norway and Sweden sign a Treaty of Cooperation in Helsinki which aims, in particular, to develop their cooperation in legislative, cultural, social and economic matters and in communications, without prejudice to the work already carried out by the Nordic Council.