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    Ammonites, aptychi, nanno- and microplankton from the Lower Cretaceous Pieniny Formation in the "Kysuca Gate" near Žilina (Western Carpathian Klippen Belt, Kysuca Unit)
    Aptychi and stratigraphy of the Lower Cretaceous in the Western Carpathians : Proceedings of the 4th International Cretaceous Symposium, Hamburg 1992
    Aptychi and their significance for taxonomy of Lower Cretaceous ammonites
    Aptychi from the Lower Cretaceous strata along the Río Argos (Caravaca, SE Spain)
    Contribution to the systematics of Lower Cretaceous ribbed aptychi
    Early Cretaceous ribbed aptychi - a proposal for a new systematic classification