Hidalgo, O., Balant, M., & Pellicer, J. (2022).

Urospermum ×siljakii (Asteraceae), a new natural homoploid hybrid between U. dalechampii and U. picroides

. Phytotaxa, 544(2), 220–222. https://doi.org/10.11646/phytotaxa.544.2.8