Di Gristina, E., Gottschlich, G., & Raimondo, F. M. (2016).

Rediscovery of Hieracium nebrodense (Asteraceae), a little-known endemic of Sicily (Italy)

. Phytotaxa, 265(1), 59–66. https://doi.org/10.11646/phytotaxa.265.1.5