Nobis, Agnieszka, Marcin Nobis, Agnieszka Pierścińska, and Anna Trojecka-Brzezińska. “Leontodon Saxatilis Lam.: A Range-Expanding Plant or a Poorly Recognized Species in Poland?”. Biodiversity: Research and Conservation 21 (October 20, 2011): 27–30. Accessed January 13, 2025. https://pressto.amu.edu.pl/index.php/biorc/article/view/v10119-011-0006-x.