Dış bağlantılar
- [1], La Spezia contaminated steel.
- Cobalt-60, Environmental Protection Agency.
- National Pollutant Inventory - Cobalt fact sheet
- Cobalt-60, Oak Ridge National Laboratory.
- Cobalt-60, Centers for Disease Control and Prevention.
- NLM Hazardous Substances Databank – Cobalt, Radioactive
- Beta decay of Cobalt-60, HyperPhysics, Georgia State University.