1. Ozin, G.A. et al, Ber. Bunsenges. Phys. Chem., 1978, 82, 93, 105.
2. Ozin, G.A. et al, Inorg. Chem., 1978, 17, 2836 (ir, uv)
3. Huber, H. et al, J. Am. Chem. Soc., 1976, 98, 6508 (synth, ir, uv)
4. Ozin, G.A. et al, Ber. Bunsenges. Phys. Chem., 1978, 82, 93 (synth)
5. Ozin, G.A. et al, Inorg. Chem., 1978, 17, 2836 (ir, uv)