@misc{Boethius_Anicius_Manlius_Torquatus_Severinus_(ca_475-524)_Opera., author={Boethius, Anicius Manlius Torquatus Severinus (ca 475-524)}, howpublished={online}, publisher={Ioannes et Gregorius de Gregoriis}, language={lat}, title={Opera. T. II, Opera mathematica}, type={inkunabuł}, keywords={arytmetyka, harmonia (muz.), geometria, 1401-1500}, }