[2019-06-01]. (原始内容存档 (PDF)于2020-11-24). Árnason, Kristján, The Phonology of Icelandic and Faroese, Oxford University Press, 2011, ISBN 978-0-19-922931-4 在PHOIBLE上搜尋含有[ɻ̊]的語言
(2010),第224頁. Khan (2010),第223–224頁. Árnason, Kristján, The Phonology of Icelandic and Faroese, Oxford University Press, 2011, ISBN 978-0-19-922931-4 Khan
Chirkova & Chen (2013),第365, 367頁. Árnason, Kristján, The Phonology of Icelandic and Faroese, Oxford University Press, 2011, ISBN 978-0-19-922931-4 Chirkova
Chirkova & Chen (2013),第365, 367頁. Árnason, Kristján, The Phonology of Icelandic and Faroese, Oxford University Press, 2011, ISBN 978-0-19-922931-4 Chirkova
Editora 2001, p. 24 Keane (2004:111頁) Árnason, Kristján, The Phonology of Icelandic and Faroese, Oxford University Press, 2011, ISBN 978-0-19-922931-4 Keane