Jain, V. K.; Sagoria, V. S.; Gill, M. S., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1989, vol. 28, # 2, p. 164 - 166
Jain, V. K.; Sagoria, V. S.; Gill, M. S., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1989, vol. 28, # 2, p. 164 - 166