1. M. Bordignon-Luiz, B. Szpoganicz, et al., Inorg. Chim. Acta 72, 254 (1997); Inorg. Chim. Acta 72, 345 (1997).
2. D. Chakraborty and P. Bhattacharya, J. Chem. Soc., Dalton Trans., 3325 (1990).
3. D. Chakraborty and P. Bhattacharya, J. Inorg. Biochem. 39, 1 (1990).
4. V. Manjula, D. Chakraborty, and P. Bhattacharya, Ind. J. Chem. A 29, 577 (1990).
5. R. Tauler and B. Rode, Inorg. Chim. Acta 173, 93 (1990).