Patel, M. M.; Patel, M. R.; Patel, M. N., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1981, vol. 20, # 6, p. 623 - 624
Patel, M. M.; Patel, M. R.; Patel, M. N., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1981, vol. 20, # 6, p. 623 - 624