"The Element Vanadium." It's Elemental -. N.p., n.d. Web. 12 Feb. 2016. <http://education.jlab.org/itselemental/ele023.html>.
"Vanadium - Element Information, Properties and Uses | Periodic Table." Vanadium - Element Information, Properties and Uses | Periodic Table. N.p., n.d. Web. 12 Feb. 2016. <http://www.rsc.org/periodic-table/element/23/vanadium>.