Isagoge - Porphyrius <233-305 ca.>. (OLS)http://ftis/name/59910; Girgenti, Giuseppe. (OLS)http://ftis/name/62609; Boethius, Anicius Manlius Torquatus Severinus. (OLS)http://ftis/name/53847 (Bompiani,, 2004)
Testo greco a fronte.