@ARTICLE{Świerczewska-Gładysz_Ewa_Hexactinellid_2012, author={Świerczewska-Gładysz, Ewa}, volume={vol. 62}, number={No 4}, journal={Acta Geologica Polonica}, howpublished={online}, year={2012}, publisher={Komitet Nauk Geologicznych PAN}, publisher={Wydział Geologii UW}, title={Hexactinellid sponge assemblages across the Campanian– Maastrichtian boundary in the Middle Vistula River section, central Poland}, URL={http://journals.pan.pl/Content/81896/PDF/04swierczewska.pdf}, doi={10.2478/v10263-012-0030-y}, }