Salaj, J., 1986, The new Postrugoglobigerina praedaubjergensis Zone at the base of the stratotype of the marine Paleocene (EI Kef, Tunisia), Geologický Zbornik, Geologica Carpathica Bratislava 37:35-58.
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Salaj, J., 1986, The new Postrugoglobigerina praedaubjergensis Zone at the base of the stratotype of the marine Paleocene (EI Kef, Tunisia), Geologický Zbornik, Geologica Carpathica Bratislava 37:35-58.