Guiry, Michael D. (2015). Codium fragile var. californicum (J.Agardh) De Toni & Levi, 1887. In: Guiry, M.D. & Guiry, G.M. (2017). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php/aphia.php?p=taxdetails&id=697293 on 2018-01-18
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