Szeląg, Z. and Vladimirov, V. (2025) “Pilosella riloensis (Asteraceae), a new hybridogenous species and nomenclatural notes on P. pseudopilosella in Bulgaria”, Phytotaxa. Auckland, New Zealand, 704(2), pp. 203–207. doi: 10.11646/phytotaxa.704.2.8.