Choudhuri, S. K.; Roy, P. S.; Ghosh, A. K., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1983, vol. 22, # 11, p. 996 - 998
Choudhuri, S. K.; Roy, P. S.; Ghosh, A. K., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1983, vol. 22, # 11, p. 996 - 998