Chaturvedi, K. K.; Singh, R. V.; Tandon, J. P., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1986, vol. 25, # 8, p. 774 - 775
Chaturvedi, K. K.; Singh, R. V.; Tandon, J. P., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1986, vol. 25, # 8, p. 774 - 775