Sobisz, Zbigniew. “The Association Geranio Phaei-Urticetum Dioicae Hadač Et Al. (1969) in Central Pomerania”. Biodiversity: Research and Conservation 35 (March 11, 2015): 87–92. Accessed September 27, 2024. https://pressto.amu.edu.pl/index.php/biorc/article/view/biorc-2014-0020.