BioStor
 | Species Lepidopterorum hucusque descriptae vel iconibus expressae in seriem systematicam digestae. Pars prima. Papilionidae C Felder and R Felder (1864) Verhandlungen der Zoologisch-Botanischen Gesellschaft in Wien 14: 289-378 |
 | A list of the ferns and fern allies of North America north of Mexico, with principal synonyms and distribution William R Maxon (1901) Proceedings of The United States National Museum 23: 619-651 |