Cvetkoska, Aleksandra, Zlatko Levkov, Paul B. Hamilton, and Marina Potapova. 2014. “The Biogeographic Distribution of Cavinula (Bacillariophyceae) in North America With the Descriptions of Two New Species”. Phytotaxa 184 (4). Auckland, New Zealand:181–207. https://doi.org/10.11646/phytotaxa.184.4.1.