@misc{Tzetzes_Ioannes_(post_1110-post_1180)_Iōannu,
 author={Tzetzes, Ioannes (post 1110-post 1180)},
 howpublished={online},
 publisher={Oporinus, Johann (1507-1568)},
 language={gre},
 language={lat},
 type={stary druk},
 title={Iōannu Tu Tzetzu Vivlion Historikon To Dia Stichōn Politikōn [...]},
 keywords={Bonifacio, Giovanni Bernardino (1517-1597), discarded parchment, bookbinding, parchment, neumatic notation, neumes, gradual, missal},
}