@misc{Euclides_(c._300_BC_–_)_Evclidis,
 author={Euclides (c. 300 BC – )},
 howpublished={online},
 publisher={Johann Herwagen},
 title={Evclidis Megarensis Mathematici Clarissimi Elementorum Geometricorum. Lib.XV.},
 type={stary druk},
}