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Stein, M.; Föllmi, K.B.; Westermann, S.; Godet, A.; Adatte, T.; Matera, V.; Fleitmann, D.; Berner, Z. (2011). Progressive paleoenvironmental change during the Late Barremian - Early Aptian as prelude to Oceanic Anoxic Event 1a: Evidence from the Gorgo a Cerbara section (Umbria-Marche basin, central Italy). Palaeogeography, Palaeoclimatology, Palaeoecology, 302(3-4), pp. 396-406. Amsterdam: Elsevier 10.1016/j.palaeo.2011.01.025
