@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://journals.pan.pl/Content/81933/PDF/04_brachaniec.pdf},
 doi={10.2478/agp-2014-0004},
}