Fraser-Jenkins, Christopher R., and Vasco Silva. “Asplenium Trichomanes L. Subsp. Coriaceifolium (Pteridophyta: Aspleniaceae) in Continental Portugal”. Acta Botanica Malacitana 46 (November 2, 2021): 169–172. Accessed December 16, 2025. https://www.revistas.uma.es/index.php/abm/article/view/13526.