Snyder et al. Journal of the American Chemical Society, 1947 , vol. 69, p. 2672 Full Text View citing articles Show Details I.G. Farbenind. Patent: DE631016 , 1934 ; Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 23, p. 244 Full Text Show Details Reppe et al. Justus Liebigs Annalen der Chemie, 1956 , vol. 601, p. 81,104