http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Supplement. Compounds with S, Se, Te and B
by David Brown, Horst Wedemeyer ; edited by Karl-Christian Buschbeck, Cornelius Keller.
Gmelin handbook of inorganic and organometallic chemistry