@misc{Goddu_Andre_Ptolemy,,
 author={Goddu, Andre},
 copyright={Goddu, Andre},
 address={Warszawa},
 howpublished={online},
 publisher={PWN},
 language={eng},
 type={artykuł},
 title={Ptolemy, Copernicus, and Kepler on linear distances},
 keywords={Kepler, Johannes, Kopernik, Mikołaj, Ptolomeus},
}