@ARTICLE{Brachaniec_Tomasz_Spherules_2014, author={Brachaniec, Tomasz and Karwowski, Łukasz and Szopa, Krzysztof}, volume={vol. 64}, number={No 1}, journal={Acta Geologica Polonica}, howpublished={online}, year={2014}, publisher={Komitet Nauk Geologicznych PAN}, publisher={Wydział Geologii UW}, title={Spherules associated with the cretaceous–paleogene boundary in Poland}, URL={http://ochroma.man.poznan.pl/Content/81933/PDF/04_brachaniec.pdf}, doi={10.2478/agp-2014-0004}, }