Kozlowski, Gregor, Jens Freigang, Salvatore Pasta, Riccardo Guarino, Francesco Anania, Luca Champoud, Giuseppe Garfì, Alessandro Silvestre Gristina, Corrado Marcenò, Rosa Maria Picone, and Alessandro Crisafulli. 2025. “Update on the current occurrence of two rare fern species in Sicily (Italy): Dryopteris affinis (Lowe) Fraser-Jenk. and D. robusta (Oberh. et Tavel ex Fraser-Jenk.) P. D. Sell. in the Peloritani Mountains”. Mediterranean Botany 46, nº 2: e99974. https://doi.org/10.5209/mbot.99974