Osiadacz, Barbara, and Mirosław Kręciała. “Ophrys Apifera Huds. (Orchidaceae), a New Orchid Species to the Flora of Poland”. Biodiversity: Research and Conservation 36 (May 9, 2015): 11–16. Accessed August 17, 2024. https://pressto.amu.edu.pl/index.php/biorc/article/view/biorc-2014-0027.