The details of the incident are presented in the report 'Ubåt 137 på svenskt vatten' ('Submarine 137 in Swedish Waters'), Defence Staff Information Branch, December 18, 1981.
2.
'Att möta ubåtshotet - ubåtskränkningarna och svensk säkerhetspolitik' ('To Meet the Submarine Threat - The Submarine Incursions and Swedish Security Policy'). Report from the Submarine Protection Committee, (SOU 1983 :13).
3.
This identification was based on a number of sources as the bottom-prints left by submarines (not those by miniature submarines), optical observations, sonar- and signal intelligence material.
4.
See Wilhelm Agrell'Spelet om neutraliteten' ('The Game of the Neutrality') Folk och Försvar, Stockholm1983.
5.
Magne Barth: 'The Movement for a Nuclear-Weapon-Free Zone in the Nordic Region - Impact of the Karlskrona Incident'Bulletin of Peace Research , Vol. 13, No. 2, 1982.
6.
Wilhelm Agrell : 'En antydan till ett svenskt Pearl Harbour' ('A Taste of a Swedish Pearl Harbour')Dagens Nyheter , 8. December 1981.
7.
In his speech to the Paasarivi Society in Helsinki 1 June 1983, the Swedish Prime Minister Olof Palme underlined the importance of the Helsinki-treaty and its confirmation of the inviolability of national borders before turning to the zone issue. He did not, however, explicitly connect these two issues.
