FRITZ, Gisela, Ralph SCHILL, Martin PFANNKUCHEN, and Franz BRÜMMER. “The Freshwater Jellyfish Craspedacusta Sowerbii Lankester, 1880 (Limnomedusa: Olindiidae) in Germany, With a Brief Note on Its Nomenclature”. Journal of Limnology 66, no. 1 (February 1, 2007): 54-59. Accessed March 31, 2020. https://jlimnol.it/index.php/jlimnol/article/view/jlimnol.2007.54.