Tarafder, M. T. H.; Ahmed, Alauddin, Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1986, vol. 25, # 8, p. 729 - 732
Tarafder, M. T. H.; Ahmed, Alauddin, Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1986, vol. 25, # 8, p. 729 - 732