Good, John Mason; Gregory, Olinthus; Bosworth, Newton (1819). "Scheele (Charles William)". Pantologia A new cabinet cyclopaedia, comprehending a complete series of essays, treatises, and systems, alphabetically arranged; with a general dictionary of arts, sciences, and words. London: J. Walker. ISBN1179565665. Retrieved 31 March 2015.
Pyykkö, Pekka and Orama, Olli (1996). "What did Johan Gadolin actually do?"(PDF). In Evans, C. H. (ed.). Episodes from the History of the Rare Earth Elements. Dordrecht: Kluwer. pp. 1–12.{{cite book}}: CS1 maint: multiple names: authors list (link)
lanl.gov
periodic.lanl.gov
"Gadolinium". Periodic Table of Elements: LANL. Retrieved 31 March 2015.
minrec.org
"GADOLIN, Johan". The Mineralogical Record, Inc. Retrieved 1 April 2015.