Di Gristina, E., Domina, G., Gottschlich, G., Maturo, F. & Scafidi, F. (2019)

Hieracium racemosum subsp. lucanum (Asteraceae), a new hawkweed from southern Italy

. Phytotaxa 425 (5): 297–300. https://doi.org/10.11646/phytotaxa.425.5.5