Zenkteler, Elżbieta, and Oskar Nowak. 2019. “Application of Morphometric Study to Discriminate Pteridium Aquilinum (L.) Kuhn Subsp. Pinetorum (C. N. Page & R. R. Mill 1995) J. A. Thomson in Poland”. Biodiversity: Research and Conservation 56 (December):1-12. https://doi.org/10.2478/biorc-2019-0015.