BioStor
 | Review of the taxonomy of Aster sensu lato (Asteraceae: Astereae), emphasizing the New World species G L Nesom Phytologia 77: 141-297 |
 | XLII.—On the fecundation of the Coniferæ W Hofmeister (1854) Annals And Magazine of Natural History 14: 429-440 |
 | Nomenclatural notes on Aster (Asteraceae) -- II. New combinations and some transfers A G Jones (1984) Phytologia 55: 373-388 |
 | New names and combinations in Compositae, tribe Astereae J C Semple (1985) Phytologia 58: 429-431 |
 | Taxonomy of Doellingeria (Asteraceae: Astereae) G L Nesom (1993) Phytologia 75: 452-462 |