ChemGlobe: Dubnium
- Electronic data along with an isotope table and basic facts.
- http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/105.html
LANL: Dubnium
- Basic information, history, and isotopes.
- http://periodic.lanl.gov/elements/105.html
Lenntech: Dubnium
- Physical data and chemical properties.
- http://www.lenntech.com/Periodic-chart-elements/Db-en.htm
EnvironmentalChemistry.com: Dubnium
- Atomic structure, physical properties, and table of nuclides.
- http://environmentalchemistry.com/yogi/periodic/Db.html