1. Chakravorty, A., Coord. Chem. Rev., 1974, vol. 13, p. 1.
2. Bertrand, J.A. and Eller, P.G., Prog. Inorg. Chem., 1976, vol. 21, p. 29.
3. Mehrotra, R.C., in: Comprehensive Coordination Chemistry, Wilkinson, G., Gillard, R.D., and McCleverty, J.A., Eds., Vol. 2, Oxford: Pergamon Press, 1987, p. 269.
4. Smith, A.G., Tasker, P.A., and White, D.J., Coord. Chem. Rev., 2003, vol. 241, p. 61.
5. Chaudhuri, P., Coord. Chem. Rev., 2003, vol. 243, p. 143.