Chaurasia, M. R.; Saxena, S. K.; Khattri, S. D., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1981, vol. 20, # 7, p. 741 - 743
Chaurasia, M. R.; Saxena, S. K.; Khattri, S. D., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1981, vol. 20, # 7, p. 741 - 743