Engblom , Eva, Per-Erik Lingdell, Ludmila Marvanová, and Agnes Müller-Haeckel. “Foam Spora in Running Waters of Southern Greenland”. Polar Research 4, no. 1 (January 5, 1986): 47-51. Accessed April 4, 2026. https://polarresearch.net/index.php/polar/article/view/2490.