Giussani, Luigi. “The Hidden Harmony.” In Vespri, by Sergej Rachmaninov, 13-14. Performed by: Coro dell’Accademia di Stato dell’URSS. Conductor: Aleksandr Vasil’evič Svešnikov. Spirto Gentil, 17. [S.l.]: Ricordi, 2001. [CD-Audio + booklet].