1. Lignan glucosides from the seeds of Centaurea americana (Compositae)
2. Two New Lignan Glucosides from Arum italicum
3. Dictionary of Natural Products (DNP) on CD-ROM, 2001. Chapman and Hall, Boca Raton, Florida.
4. Centaurea scabiosa: a source of dibenzylbutyrolactone lignans
5. GRIN database, 2003. USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network (GRIN), National Germplasm Resources Laboratory, Beltsville, Maryland, USA. Available from http/www.ars-grin.gov/cgi-bin/npgs/html/tax_search.pl?Centaurea+cyanus.