Bechtold, Thomas, and Rita Mussak. "History of Natural Dyes in the Ancient Mediterranean World." in Melo, Maria J. Handbook of Natural Colorants. New York: John Wiley & Sons, Ltd., 2009.

Bechtold, Thomas, and Rita Mussak. "History of Natural Dyes in the Ancient Mediterranean World." in Melo, Maria J. Handbook of Natural Colorants. New York: John Wiley & Sons, Ltd., 2009.