Piwowarczyk, Renata. “The Genus Orobanche L. (Orobanchaceae) in the Małopolska Upland (S Poland): Distribution, Habitat, Host Preferences, and Taxonomic Problems”. Biodiversity: Research and Conservation 26 (November 30, 2012): 3–22. Accessed July 18, 2024. https://pressto.amu.edu.pl/index.php/biorc/article/view/v10119-012-0009-2.