1. Boron, Metallo-Boron, Compounds and Boranes; Adams, R. M., Ed.; Interscience Publishers: New York, 1964; p 233.
2. Greenwood, N. N.; Earnshaw, A.Chemistry of the Elements; Reed Educational and Professional Publishing Ltd: UK, 1997; p 139.
3. Bailey, J. E. inHandbook of Polymer-Fibre Composites; Jones, F. R., Eds.; Longman Scientific & Technical: Harlow, UK, 1994; p 15.
4. The effect of impurities on the mechanical properties of zone-melted boron