Pandey, K. K.; Agarwala, U. C., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1981, vol. 20, # 3, p. 240 - 242
Pandey, K. K.; Agarwala, U. C., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1981, vol. 20, # 3, p. 240 - 242