|
Sweden | |
| Damman, A.H.(1989): Hydrothermal orthoamphibole-bearing assemblages from the Gåsborn area, West Bergslagen, central Sweden. American Mineralogist. 74, 573-585 |
| Holtstam, Dan, Langhof, Jörgen - Eds. (1999) Långban - The mines, their minerals, geology and explorers. Raster Förlag; Swedish Museum of Natural History, Stockholm. p.1-216. |
| Östra Värmlands Mineral Society,Långban,Sweden |