Barbero, Margherita; Crisma, Marco; Degani, Lacopo; Fochi, Rita; Perracino, Paolo
Synthesis, 1998 , # 8 p. 1171 - 1175

Schmidt, Martin U.; Bruening, Juergen; Wirth, Daniela; Bolte, Michael
Acta Crystallographica Section C: Crystal Structure Communications, 2008 , vol. 64, # 9 p. o474-o477

Tedder
Journal of the Chemical Society, 1957 , p. 4003,4006

Hoechster Farbw.
Patent: DE87585 ;
Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 4, p. 812