LEDINGHAM, G. F.; LARMOUR, S. D. Some Observations on the Pasque-Flower. Blue Jay, [S. l.], v. 32, n. 1, 1970. DOI: 10.29173/bluejay4061. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/4061. Acesso em: 16 apr. 2025.