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Sweden | |
| Henry, N.F.M. (1935) Some data on the iron-rich hypersthenes. Mineralogical Magazine, vol. 24, n° 151, 221-226. |
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| Henry, N.F.M. (1935) Some data on the iron-rich hypersthenes. Mineralogical Magazine, vol. 24, n° 151, 221-226. Sundius, N. (1932) Uber den sogenannten Eisenanthophyllit der Eulysite. Årsbok, Sveriges Geol. Undersökning, vol. 26, no. 2 [M.A. 6-118]. |