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2. MIL-I-38538, Appendix A. paragraph 30.5.5, Internal conductors.
3. Stress generation by electromigration
4. Standard Guide for Design of Flat, Straight-Line Test Structures for Detecting Metallization Open-Circuit or Resistance-Increase Failure Due to Electromigration, F 1259-89, Annual Book of ASTM Standards, Vol. 10.04.