Bergel; Stock Journal of the Chemical Society, 1954 , p. 2409,2414 Journal of the Chemical Society, 1959 , p. 90,93 Full Text Show Details Chough Seoul Univ. J.Chem.Abstr., 1959 , vol. 8, p. 335,355 Seoul Univ. J.Chem.Abstr., 1960 , p. 13129