Carmina Leonis 13. p. o. m. Italicis versibus reddidit Carolus Maria Nay. - Leo XIII, <papa, 1810-1903>. (OLS)http://semarc/name/553; Nay, Carlo Maria. (OLS)http://semarc/name/93153 (Ex Officina Libraria A. Cortellezzi,, 1881)