Vikhagen, Arne Kjell. — «Workshop in Visby Nov 5-6th». — Arne Kjell Vikhagen. — [S.l. : A. K. Vikhagen]. — [Date of reference : January 25, 2005]. — Access : {{http://vikhagen.net/research/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=8&MMN_position=9:9}}.