Klaper, M. 2009. Hispania Vetus. Musical-Liturgical Manuscripts from Visigothic Origins to the Franco Roman Transition (9th–12th Centuries). Die Musikforschung. 62, 4 (Dez. 2009), 384–385. DOI:https://doi.org/10.52412/mf.2009.H4.4317.