1. Blake AJ, Schröder M (1990) Advances in inorganic chemistry. In: Sykes AG (ed). Academic, New York 35:2
2. Cooper SC, Rawle SR (1990) Struct Bond 72:1
3. Holloway CE, Melnik M (1994) Main Group Metal Chemistry 11–12:99
4. Baumann TF, Reynolds JG, Fox GA (1998) J Chem Soc Chem Comm p 1637
5. Baumann TF, Reynolds JG, Fox GA (2000) PCT Int Appl WO 2000052004