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Oftedahl, C., 1946: Studies on the Igneous Rock Complex of the Oslo Region. VI. On akerites, felsites and rhomb-porphyries. NVAMK

Saether, E., 1962: Studies on the Igneous Rock Complex of the Oslo Region. XVIII. General investigation of the igneous rocks in the area north of Oslo. NVAMK

Gaut, A., 1981: Field relations and petrography of the Biotit Granites of the Oslo Region. NGU 367

Huizinga, M.H., 1969: Rapakivigesteenten uit het Oslogebied. GH

Holtedahl, O., 1943: Studies on the Igneous Rock Complex of the Oslo Region. I. Some structural features of the district near Oslo. Skr. Vid.-Akad. i Oslo, I, 2.

Sørensen, R., 1975: The Ramnes Cauldron in the Permian of the Oslo Region, Southern Norway. NGU. 321

Geological guide to Oslo and district : text to geological map of Oslo and district (scale 1:50 000) / edited by Olaf Holtedahl and Johannes A. Dons

Jensch, J-F. 2012: Der Horn-Quarzporphyr vom Oslogebiet, ein unbeachtetes Leitgeschiebe. Geschiebekunde aktuell 28. Hamburg/Greifswald