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Switzerland | |
| www.mineralienatlas.de (2021) https://www.mineralienatlas.de/lexikon/index.php/Schweiz/Tessin%2C%20Kanton/Leventina%2C%20Bezirk/Airolo%2C%20Kreis/Airolo/Val%20Canaria |
| www.mineralienatlas.de (n.d.) https://www.mineralienatlas.de/lexikon/index.php/Schweiz/Tessin%2C%20Kanton/Leventina%2C%20Bezirk/Airolo%2C%20Kreis/Airolo/Val%20Tremola/Pizzo%20Posmeda |
| www.mineralienatlas.de (n.d.) https://www.mineralienatlas.de/lexikon/index.php/Schweiz/Tessin%2C%20Kanton/Leventina%2C%20Bezirk/Airolo%2C%20Kreis/Airolo/Monte%20Prosa |
| Abrecht, J., Biino, G.G., Mercolli, I., and Stille, P. (1991) Mafic-ultramafic rock associations in the Aar, Gotthard and Tavetsch Massifs of the Helvetic domain in the Central Swiss Alps: markers of ophiolitic pre-Variscan sutures, reworked by polymetamorphic events? Schweizerische mineralogische und petrographische Mitteilungen: 71(2): 295-300. |
| Charlotte Redler, Alfred Irouschek, Teresa Jeffries and Reto Gieré (2016): Origin and Formation of Tourmaline-rich Cordierite-bearing Metapelitic Rocks from Alpe Sponda, Central Alps (Switzerland). Journal of Petrology, 57, 277-308. |
Central St Gotthard Massif, Leventina, Ticino, Switzerland