@misc{Boethius_Anicius_Manlius_Torquatus_Severinus_(około_475-524)_Opera.,
 author={Boethius, Anicius Manlius Torquatus Severinus (około 475-524)},
 howpublished={online},
 language={lat},
 title={Opera. T. 2, Opera mathematica.},
}