FERRER-GALLEGO, P. P. Type designations for Centaurea saxicola and Cirsium valentinum (Asteraceae). Phytotaxa, Auckland, New Zealand, v. 638, n. 1, p. 94–100, 2024. DOI: 10.11646/phytotaxa.638.1.9. Disponível em: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.638.1.9. Acesso em: 6 dec. 2025.