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Norway | |
| Sæbø, Per Christian (1966) Contributions to the mineralogy of Norway. No. 35. The first occurrences of the rare mineral barylite, Be2BaSi2O7, in Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 46 (3) 335-348 |
| Berge, Svein A. (n.d.) Personal communication. |
| Knut Edvard Larsen observation on material collected august 2013 |
| Andersen, Frode (1993) Hedrum pukkverk i Lågendalen. STEIN. Nordisk magasin for populær geologi, 20 (4) 236-238 |
| Berge, Svein A. (n.d.) Personal communication. |
| Berge, Svein A. (n.d.) Personal communication. |
| Berge, Svein A. (n.d.) Personal communication. |
| Larsen, Alf Olav, Andersen, Frode, Dahlgren, Sven, Larsen, Knut Edvard, Burvald, Ingulv - Ed. (2010) The Langesundsfjord - History, geology, pegmatites, minerals. Bode Verlag Gmbh. p.1-240. |
| Knut Edvard Larsen collection # 1832 |