Boeniger Chemische Berichte, 1894 , vol. 27, p. 23 Full Text Show Details Chem. Fabr. vorm. Sandoz Patent: DE109273 ; Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 5, p. 347 Full Text Show Details Chem. Fabr. vorm. Sandoz Chem. Zentralbl., 1900 , vol. 71, # I p. 1253