Palisca, Claude V. Grout, Donald Jay, 1902-1987 History of western music. Euripides, v480-v407 Orestes. Selections. Wipo, active 11th century. Victimae paschali laudes. Hildegard, Saint, 1098-1179. Ordo virtutum. In principio omnes.

Beethoven, Ludwig van, 1770-1827 Stapleton, Robin Dresden, Adolf. Benacková, Gabriela. Protschka, Josef.