SZELĄG, Z.; VLADIMIROV, V. A new species of Hieracium sect. Pannosa (Asteraceae) from Bulgaria. Phytotaxa, Auckland, New Zealand, v. 108, n. 1, p. 57–60, 2013. DOI: 10.11646/phytotaxa.108.1.5. Disponível em: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.108.1.5. Acesso em: 6 dec. 2025.