BioStor
 | The genera of Cardueae (Compositae; Asteraceae) in the southeastern United States R W Scott (1990) Journal of the Arnold Arboretum 71: 391-451 |
 | Host specificity of Chaetorellia australis (Diptera : Tephritidae) for biological control of yellow starthistle (Centaurea solstitialis, Asteraceae) D M Maddox, A Mayfield and C E Turner (1990) Proceedings of the Entomological Society of Washington 92: 426-430 |