F. Sachs, R. Kempf: Über p-Halogen-o-nitrobenzaldehyde. In: Ber. Dtsch. Chem. Ges. Bd. 36(3), 1903, S. 3299–3303, doi:10.1002/cber.190303603113.
jstor.org
Robert R. Stieglitz (1994): The Minoan Origin of Tyrian Purple. Biblical Archaeologist 57 (1): 46-54. JSTOR:3210395
Michael C. Astour (1965): The Origin of the Terms "Canaan," "Phoenician," and "Purple". Journal of Near Eastern Studies 24 (4) (Erich F. Schmidt Memorial Issue, Part 2): 346-350. JSTOR:543644