1. Abdel-Gawad GI (1986) Maastrichtian non-cephalopod molluscs (Scaphopoda, Gastropoda and Bivalvia) of the Middle Vistula Valley, Central Poland. Acta Geol Polon 31:69–224
2. Alexandrowicz SW, Radwan D (1973) The Upper Cretaceous from the Opole Trough—stratigraphy and deposits. Prz Geol 4:183–188 (in Polish)
3. Beresi MS (2003) Oxfordian sponge association from the Neuquén Basin, Mendoza, west central Argentina. J South Am Earth Sci 16:105–112
4. Błaszkiewicz A (1980) Campanian and Maastrichtian ammonites of the Middle Vistula River Valley, Poland; A stratigraphic-paleontological study. Pr Inst Geol 42:1–63
5. Bodzioch A (1993) Sponges from the epicontinental Triassic of Europe. In: Hagdorn H, Seilacher A (eds) Muschelkalk. Goldschneck, Stuttgart, pp 235–243