A. CVETKOSKA, Z. LEVKOV, and P. B. HAMILTON, “<em>Surirella subrotunda sp. nov.</em> and <em>Surirella parahelvetica sp. nov.</em>, two new diatom (Bacillariophyta) species from Lake Prespa, Macedonia”, Phytotaxa, vol. 156, no. 3, pp. 145–155, Jan. 2014.