Seal, B. K.; Banerjee, B.; Mukherjee, D. C., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1986, vol. 25, # 9, p. 799 - 802
Seal, B. K.; Banerjee, B.; Mukherjee, D. C., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1986, vol. 25, # 9, p. 799 - 802