Vannier, J. M. C.; Siveter, D. J.; Schallreuter, R. E. L. (1989). he composition and palaeogeographical significance of the Ordovician ostracode faunas of southern Britain, Baltoscandia, and Ibero-Armorica. Palaeontology. 32(1): 163-222.
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Vannier, J. M. C.; Siveter, D. J.; Schallreuter, R. E. L.
1989
he composition and palaeogeographical significance of the Ordovician ostracode faunas of southern Britain, Baltoscandia, and Ibero-Armorica