Pite, Danielle P., Kelly A. Lane, Anna K. Hermann, Sarah A. Spaulding, and Bruce P. Finney. 2009. “Historical Abundance and Morphology of Didymosphenia Species in Naknek Lake, Alaska”. Acta Botanica Croatica 68 (2). https://www.abc.botanic.hr/index.php/abc/article/view/104.