Ratyńska, H., Waldon, B., & Boratyński, A. (2006). Xerothermic and anthropophytic species populations in the grassland communities of “Skarpy Ślesińskie” Nature Reserve and its surroundings. Biodiversity: Research and Conservation, (3-4), 381–385. https://doi.org/10.14746/biorc.2006.3-4.41