Symphyotrichum falcatum crassulum (Rydb.) Nesom
| Review of the taxonomy of Aster sensu lato (Asteraceae: Astereae), emphasizing the New World species G L Nesom Phytologia 77: 141-297 | |
| Gall midges of Aster, Carya, Quercus and Salix E P Felt (1910) J. Econ. Ent 3: 347-356 | |
| A revision of the bees of the genus Melissodes in North and Central America. Part III (Hymenoptera, Apidae) (1961) University of Kansas Science Bulletin 42: 283-663 |