1. Wilke G (1995) In: Fink G, Mullhaupt R, Brintzinger HH (eds), Ziegler Catalysts. Springer, Berlin, Heidelberg, New York, chapter 1
2. Robinoson GH (1993) In: Robinson GH (ed), Coordination Chemistry of Aluminum. VCH, New York, chapter 2
3. Atwood DA, Harvey MJ (2001) Chem Rev 101: 37
4. Dzugan SJ, Goedken VL (1986) Inorg Chem 25: 2858
5. Gurian PL, Cheatham LK, Ziller JW, Barron AR (1991) J Chem Soc Dalton Trans 1449