Ullah, S. S.; Kabir, S. E.; Molla, M. E., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1985, vol. 24, # 6, p. 509 - 510
Ullah, S. S.; Kabir, S. E.; Molla, M. E., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1985, vol. 24, # 6, p. 509 - 510