Szeląg, Z. (2025).
Hieracium sourekii
(Asteraceae), a new species in the
H. senescens
aggregate and the discovery of
H. subortum
in the Sudetes, Poland.
Phytotaxa
,
696
(3), 217–223. https://doi.org/10.11646/phytotaxa.696.3.2