@misc{Boethius_Anicius_Manlius_Torquatus_Severinus_(około_475-524)_De,
 author={Boethius, Anicius Manlius Torquatus Severinus (około 475-524) and http://viaf.org/viaf/100218964 and Frutolfus Bambergensis ( -1103) and http://viaf.org/viaf/14899082},
 howpublished={online},
 language={lat},
 type={text},
 title={De institutione arithmetica},
 title={Rythmimachia},
 keywords={11 w., 12 w., historia matematyki},
}