Lurling, M.; Beekman, W. (September 1999). "Grazer-induced defenses in scenedesmus (Chlorococcales; Chlorophyceae): coenobium and spine formation". Phycologia. 38 (5). United Kingdom, Lawrence: Allen Press Publishing Services: 368. doi:10.2216/i0031-8884-38-5-368.1. ISSN0031-8884. ProQuest198599556.
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Lurling, M.; Beekman, W. (September 1999). "Grazer-induced defenses in scenedesmus (Chlorococcales; Chlorophyceae): coenobium and spine formation". Phycologia. 38 (5). United Kingdom, Lawrence: Allen Press Publishing Services: 368. doi:10.2216/i0031-8884-38-5-368.1. ISSN0031-8884. ProQuest198599556.
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Lurling, M.; Beekman, W. (September 1999). "Grazer-induced defenses in scenedesmus (Chlorococcales; Chlorophyceae): coenobium and spine formation". Phycologia. 38 (5). United Kingdom, Lawrence: Allen Press Publishing Services: 368. doi:10.2216/i0031-8884-38-5-368.1. ISSN0031-8884. ProQuest198599556.