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The end-Frasnian mass extinction in the Eifel Mountains, Germany : new insights from organic matter composition and preservation | Hartkopf-Fröder, Christoph; Kloppisch, Marina; Mann, Ulrich | 2016 | |
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Strontium isotope systematics of conodonts : Middle Devonian, Eifel Mountains, Germany | Ebneth, Stefan | 1997 | |
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Strontium isotope stratigraphy of the Middle Devonian : brachiopods and conodonts | Diener, Andreas | 1996 |