[9] Ber. 10, 1934 (1877); 34, 1285 (1901).
[10] Ann. 89, 247 (1854); Ber. 34, 1162 (1901).
[11] Ber. 30, 1870 (1897).
[1b] Ber. 31, 1458 (1898); Am. Chem. J. 26, 20 (1901).
[2b] Ann. chim. phys. (5) 22, 270 (1881).
[3b] Ber. 18, 2915 (1885); 21, 889 (1888).
[4b] D. R. P. 109,012; Frdl. 5, 664 (1900); D. R. P. 117,129; Frdl. 6, 112 (1901); J. Soc. Dyers and Colourists, 36, 138 (1920).
[5b] D. R P. 117,129; Frdl. 6, 112 (1901).
[6b] D. R. P. 117,251; Frdl. 6, 109 (1901); U. S. Pat. 1,322,580 (1919); C. A. 14, 287 (1920); Rev. produits chim. 21, 219 (1918); 21, 288 (1918).
[7b] U. S. Pat. 1,318,631 (1919); C. A. 14, 70 (1920).