LIPPHARDT, Walther. Studien zur Rhythmik der Antiphonen. Die Musikforschung, [S. l.], v. 3, n. 1, p. 47–60, 1950. Disponível em: https://mf.journals.qucosa.de/mf/article/view/2885. Acesso em: 14 mai. 2025.