Singh, H; Srivastava, V K; Shukla, S N, Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1992, vol. 31, # 7, p. 472 - 474
Singh, H; Srivastava, V K; Shukla, S N, Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1992, vol. 31, # 7, p. 472 - 474