FRISTRUP, B. Ice Alias of the Northern Hemisphere. Hydrographie Office, publication no. 550. Udgivet af Hydrographie Office, United States Navy under the authority of the Secretary of the Navy. Washington. Geografisk Tidsskrift, [S. l.], v. 50, 1950. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/48456. Acesso em: 5 maj. 2024.