Balasubramanian, V.; Iyengar, R. R.; Patel, C. C., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1981, vol. 20, # 7, p. 677 - 679
Balasubramanian, V.; Iyengar, R. R.; Patel, C. C., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1981, vol. 20, # 7, p. 677 - 679