| Kolitsch, Uwe, Andresen, Peter, Husdal, Tomas Andersen, Ertl, Andreas, Haugen, Astrid, Ellingsen, Hans Vidar, Larsen, Alf Olav (2013) Tourmaline-group minerals from Norway, part II: Occurrences of luinaite-(OH) in Tvedalen, Larvik and Porsgrunn, and fluor-liddicoatite, fluor-elbaite and fluor-schorl at Ågskardet, Nordland. Norsk Bergverksmuseum Skrift, 50. 23-41 |
Kokkersvold, Kokkersvold - Blåfjell E18 roadcuts, Langangen, Porsgrunn, Telemark, Norway