Tidsskr., 6, 143-194* Gillen, Cornerlius, 1982, "Metamorphic Geology : an Introduction to Tectonic and Metamorphic Processes", London; Boston: G. Allen & Unwin ISBN 978-0-04-551058-0* Marshak, Stephen, 2009, "Essentials of Geology," W. W. Norton & Company, 3rd ed.
Tidsskr., 6, 143-194*Gillen, Cornerlius, 1982, "Metamorphic Geology : an Introduction to Tectonic and Metamorphic Processes", London; Boston: G. Allen & Unwin ISBN 978-0045510580*Marshak, Stephen, 2009, "Essentials of Geology," W. W. Norton & Company, 3rd ed.