Chaudhry, S. C.; Gupta, Jitendra, Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1985, vol. 24, # 2, p. 150 - 153
Chaudhry, S. C.; Gupta, Jitendra, Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1985, vol. 24, # 2, p. 150 - 153