Haq et al. Journal of the Chemical Society, 1933 , p. 1087 Journal of the Chemical Society, 1934 , p. 1326 Full Text Show Details Borsche Justus Liebigs Annalen der Chemie, 1936 , vol. 526, p. 1,21 Full Text Show Details Dalal; Nargund Journal of the Indian Chemical Society, 1937 , vol. 14, p. 406,409