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Gary W. Saunders, Max H. Hommersand: Assessing red algal supraordinal diversity and taxonomy in the context of contemporary systematic data. In: American Journal of Botany, Band 91, Nr. 10, Oktober 2004, S. 1494–1507, doi: 10.3732/ajb.91.10.1494, PMID 21652305 (englisch).