@misc{Derwich_Marek_Janko,
 author={Derwich, Marek},
 address={Warszawa},
 address={Wrocław},
 howpublished={online},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 title={Janko z Czarnkowa a "Kronika Wielkopolska"},
 keywords={"Leopoldina online", 13 w., 14 w.},
}