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Del Guacchio, Emanuele; Bureš, Petr; Iamonico, Duilio; Carucci, Francesca; De Luca, Daniele; Zedek, František; Caputo, Paolo (2022). "Towards a monophyletic classification of Cardueae: Restoration of the genus Lophiolepis (= Cirsium p.p.) and new circumscription of Epitrachys". Plant Biosystems. 156 (5): 1269–1290. Bibcode:2022PBios.156.1269D. doi:10.1080/11263504.2022.2131924. S2CID252700781.
Del Guacchio, Emanuele; Bureš, Petr; Iamonico, Duilio; Carucci, Francesca; De Luca, Daniele; Zedek, František; Caputo, Paolo (2022). "Towards a monophyletic classification of Cardueae: Restoration of the genus Lophiolepis (= Cirsium p.p.) and new circumscription of Epitrachys". Plant Biosystems. 156 (5): 1269–1290. Bibcode:2022PBios.156.1269D. doi:10.1080/11263504.2022.2131924. S2CID252700781.