Apsidium: Hassium
   Basic information and atomic structure.
   http://www.apsidium.com/elements/108.htm

ChemGlobe: Hassium
   Electronic data along with general information and facts.
   http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/108.html

ChemicalElements.com: Hassium
   Basic information, diagram of atomic structure, and facts.
   http://www.chemicalelements.com/elements/hs.html

Chemistry of Hassium, Element 108
   Article regarding a study conducted at the Berkeley National Laboratory.
   http://www.lbl.gov/Science-Articles/Archive/108-chemistry.html

EnvironmentalChemistry.com: Hassium
   Atomic structure and table of nuclides.
   http://environmentalchemistry.com/yogi/periodic/Hs.html

Hassium - Element 108
   Basic information relating to Hassium.
   http://www.hassium.info

It's Elemental: Hassium
   Basic physical and historical information.
   http://education.jlab.org/itselemental/ele108.html

LANL: Hassium
   Basic information and history.
   http://periodic.lanl.gov/elements/108.html

Lenntech: Hassium
   Basic data.
   http://www.lenntech.com/Periodic-chart-elements/Hs-en.htm

Visual Elements: Hassium
   General and physical information, and key isotopes.
   http://www.chemsoc.org/viselements/pages/hassium.html

Wikipedia: Hassium
   Basic physical and historical information.
   http://en.wikipedia.org/wiki/Hassium