1. Official Journal of the European Union, p. L37/19 (13.2.2003).
2. “Lead-free Assembly Projects,” National Electronics Manufacturing Initiatives (NEMI), http://www.nemi.org/projects/ese/lf_assembly.html, 1999.
3. “Roadmap 2002 for Commercialization of Lead-Free Solder,” Lead-Free Soldering Roadmap Committee, Technical Standardization Committee on Electronics Assembly Technology, Japan Electronics and Information Technology Industries Association (JEITA), 2002.
4. K.N. Tu and K. Zeng, Mater. Sci. Eng. R34, 1 (2001).
5. C.-H. Lin, S.-W. Chen, and C.-H. Wang, J. Electron. Mater. 31, 907 (2002).