Rafinesque, C. S., 1820. Annals of nature or annual synopsis of new genera and species of animals, plants, & c. discovered in North America. Annals of Nature 1: 1-16. «Enllaç». Arxivat de l'original el 2016-03-03. [Consulta: 26 juny 2012].
Rafinesque, C. S., 1820. Annals of nature or annual synopsis of new genera and species of animals, plants, & c. discovered in North America. Annals of Nature 1: 1-16. «Enllaç». Arxivat de l'original el 2016-03-03. [Consulta: 26 juny 2012].