BioStor
 | A Flora of the chrome and manganese ore piles at Canton, in the Port of Baltimore, Maryland and at Newport News, Virginia, with descriptions C R Reed (1964) Phytologia 10: 321-406 |
 | Revision of chalcid wasps of genus Eurytoma in America north of Mexico (1966) Proceedings of The United States National Museum 118: 433-552 |
 | Tribal Phylogeny of the Asteraceae Based on Two Non-Coding Chloroplast Sequences, the trnL Intron and trnL/trnF Intergenic Spacer Randall J Bayer and Julian R Starr (1998) Annals of the Missouri Botanical Garden 85: 242-256 |