Szeląg, Z. 2018.

Hieracia balcanica XV. Taxonomic and nomenclatural notes on Hieracium pilosissimum and H. divaricatum, with remarks on the H. heldreichii aggregate (Asteraceae)

. Phytotaxa. 356, 1 (Jun. 2018), 81–90. DOI:https://doi.org/10.11646/phytotaxa.356.1.7.