ChemGlobe: Einsteinium - Electronic and thermal data along with an isotope table. www.vcs.ethz.ch/chemglobe/ptoe/_/99.html
ChemicalElements.com: Einsteinium - Basic information, atomic structure, and table of isotopes. www.chemicalelements.com/elements/es.html
Einsteinium - Data tables and historic information. www.scescape.net/~woods/elements/einsteinium.html
It's Elemental: Einsteinium - Basic physical and historical information. education.jlab.org/itselemental/ele099.html
LANL: Einsteinium - Basic information, history, and isotopes. pearl1.lanl.gov/periodic/elements/99.html
Visual Elements: Einsteinium - Discovery, general and physical information, and ionisation energies. www.chemsoc.org/viselements/pages/einsteinium.html
