Seal, B. K.; Mukherjee, A. K., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1986, vol. 25, # 5, p. 413 - 415
Seal, B. K.; Mukherjee, A. K., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1986, vol. 25, # 5, p. 413 - 415