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WikiPedia: Litium http://environmentalchemistry.com/yogi/periodic/Li... http://www.webelements.com/webelements/elements/te... http://catalogo.bne.es/uhtbin/authoritybrowse.cgi?... http://periodic.lanl.gov/elements/.html http://minerals.usgs.gov/minerals/pubs/commodity/l... //doi.org/10.1002%2F0471238961.1209200811011309.a0... //doi.org/10.1515%2Fpac-2015-0305 http://education.jlab.org/itselemental/ele003.html https://www.degruyter.com/downloadpdf/j/pac.2016.8... https://catalogue.bnf.fr/ark:/12148/cb119338639