Encic. ital. (Leto, Pomponio; bastard son of Giovanni, count of Sanseverino; commonly called Pomponius Laetus, also called Fortunatus, Infortunatus, Balbus, Sabinus; b. 1428, d. 1497)
Grande encicl. Vallardi (Leto, Giulio Pomponio; b. 1428, d. 1497)
His Pomponij Laeti De magistratibus Romanorum libri duo ... 1566 t.p. (Pomponij Laeti ...)