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Freyhof, J. og C. Schöter (2005). «The houting Coregonus oxyrinchus(L.)(Salmoniformes: Coregonidae), a globally extinct species from the North Sea basin». Journal of Fish Biology. 67 (3): 713–729. ISSN1095-8649. doi:10.1111/j.0022-1112.2005.00771.x.