Baeyer
Patent: DE11857 ;
Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 1, p. 129
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Baeyer
Chemische Berichte, 1880 , vol. 13, p. 2258
Thomas; Bloxam; Perkin
Journal of the Chemical Society, 1909 , vol. 95, p. 842
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Perkin
Journal of the Chemical Society, 1909 , vol. 95, p. 849