Singh, B.; Narula, A. K.; Kapoor, R. N., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1983, vol. 22, # 2, p. 156 - 158
Singh, B.; Narula, A. K.; Kapoor, R. N., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1983, vol. 22, # 2, p. 156 - 158