M M Smedskjaer, M Jensen, and Y-Z Yue «Theoretical calculation and measurement of the hardness of diopside». Journal of the American Ceramic Society, 91, 2, 2008, pàg. 514–518. DOI: 10.1111/j.1551-2916.2007.02166.x.
A L Boettcher «The Rainy Creek alkaline-ultramafic igneous complex near Libby, Montana. I: Ultramafic rocks and fenite». Journal of Geology, 75, 1967, pàg. 536–553. DOI: 10.1086/627280.