1. Coates, G. E. and Wade, K., The Main Group Elements, 3rd Edn, Methuen, London, 1967, Chapt. 2.
2. Houben-Weyls Methoden der Organischen Chemie,1973, 12/2a.
3. Sheverdina, N. E. and Kocheshkov, K. A., Methods of Elemento-Organic Chemistry,Nesmeyanov, A. N. and Kocheshkov, K. A. Eds, North-Holland, Amsterdam, 1967, Vol. 3.
4. Turner, C. J. et al., J. Magn. Reson.,1977, 26, 1.
5. Cardin, A. D. et al., J. Am. Chem. Soc.,1975, 97, 1672.