Dhingra, P. L.; Lyall, Pamela; Verma, R. D., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1988, vol. 27, # 4, p. 323 - 326
Dhingra, P. L.; Lyall, Pamela; Verma, R. D., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1988, vol. 27, # 4, p. 323 - 326