Drange, Helge; Dokken, Trond Martin; Furevik, Tore; Gerdes, Rudiger; Berger, Wolfgang. 2005. . American Geophysical Union (AGU). 366 sider. ISBN 0-87590-423-8. Drange, Helge; Furevik, Tore; Dokken, Trond Martin; Gerdes, Rudiger; Berger, Wolfgang. 2004. American Geophysical Union (AGU).