Levinson A A (1966) A system of nomenclature for rare-earth minerals, American Mineralogist 51, 152-158
Nickel E H, Mandarino J A (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature, American Mineralogist 72, 1031-1042
to
Name defined for the La dominant phase:
Levinson A A (1966) A system of nomenclature for rare-earth minerals, American Mineralogist 51, 152-158
