1. http://nepp.nasa.gov/whiskers/.
2. http://www.calce.umd.edu/lead-free/tin-whisk-ers/.
3. H. Leidecker, J. Brusse, Tin Whiskers: A History of Documented Electrical System Failures, Technical Presentation to Space Shuttle Program Office, April 2006
4. US Patent 4,325,795.
5. Bismuth Whisker Growth