@misc{Gawrońska_Natalia_Some,
 author={Gawrońska Natalia and Słota Damian and Wituła Roman and Zielonka Adam},
 howpublished={online},
 publisher={Wydaw. Politechniki Częstochowskiej},
 language={eng},
 title={Some generalizations of Gregory’s power series and their applications},
 type={czasopismo},
 keywords={Gregory's series, Gregory-Leibniz-Nilakantha formula},
}