1. and , Boron, Metallo-Boron compounds, and Boranes, Ed. Interscience Publishers, New York 1964 (p. 54).
2. Modern Aspects of the Vitreous State, Butterworths, London 1960
3. ((a) Modern Aspects of the Vitreous State, Butterworths, London 1960 p. 101,
4. (b) Modern Aspects of the Vitreous State, Butterworths, London 1960 p. 190,
5. (c) Modern Aspects of the Vitreous State, Butterworths, London 1960 p. 189,