Huys, Bernard
Huys, Bernard. 1979. Occo Codex (Brussels, Royal Library Albert I, MS. IV. 922): Facsimile Edition. Facsimilia Musica Neerlandica. Buren.
Huys, Bernard. 1974. An Unknown Alamire-Choirbook ("Occo Codex") Recently Acquired by the Royal Library of Belgium: A New Source for the History of Music in Amsterdam. Tijdschrift van de Vereniging voor Nederlandse Muziekgeschiedenis, 1-19.
Huys, Bernard. 1966. De Grégoire le Grand à Stockhausen: Douze siècles de notation musicale. Brussels.