E. H. Nickel & J. D. Grice (1998): "The IMA Commission on New Minerals and Mineral Names: procedures and guidelines on mineral nomenclature". Mineralogy and Petrology, volume 64, issue 1, pages 237–263. doi:10.1007/BF01226571
gemrock.net
Stephenson, Tim; Stephenson, Carolyn. "Rocks & Minerals". Creetown Gem Rock Museum. Archived from the original on 18 July 2019. Retrieved 18 July 2019.
geoscienceworld.org
pubs.geoscienceworld.org
Nickel, Ernest H. (1995). "The definition of a mineral". The Canadian Mineralogist. 33 (3): 689–90. Archived from the original on 2018-08-25. Retrieved 2018-04-04.
Nickel, Ernest H. (1995). "The definition of a mineral". The Canadian Mineralogist. 33 (3): 689–90. Archived from the original on 2018-08-25. Retrieved 2018-04-04.
Stephenson, Tim; Stephenson, Carolyn. "Rocks & Minerals". Creetown Gem Rock Museum. Archived from the original on 18 July 2019. Retrieved 18 July 2019.