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Norway | |
| Larsen, Alf Olav, Åsheim, Arne, Gault, Robert A. (2005) Minerals of the eudialyte group from the Sagåsen larvikite quarry, Porsgrunn, Norway. Norsk Bergverksmuseum Skrift, 30. 58-62 |
| Åmli, Reidar, Griffin, William L. (1972) Three minerals new to Norway: wickmannite, leadhillite and hydrocerussite. Contributions to the mineralogy of Norway, no. 47. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 52 (2) 193-196 |
| 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. |