Günter Bauer, Volker Günther, Hans Hess, Adreas Otto, Oskar Roidl, Heinz Roller & Siegfried Sattelberger: Vanadium and Vanadium Compounds, Ullmann's Encyclopedia of Industrial Chemistry, John Wiley & Sons, New York, 2002 Teoksen verkkoversio Viitattu 21.2.2011
