GRABNAR, K. Standard phrases in eighth-mode tracts: an attempt at explaining the formation of gregorian melodies. De musica disserenda, Ljubljana, Slovenija, v. 5, n. 2, p. 25–44, 2015. DOI: 10.3986/dmd05.2.02. Disponível em: https://ojs.zrc-sazu.si/dmd/article/view/2078. Acesso em: 6 dec. 2025.