1. Traditon of Western Music by Gerald Abraham, London Stainer and Bell 1976 p.22 2. Traditon Anxiety and the Musical Scene The Baroque Opera by Henry Parcel p. 107-110 3. The Polyphony to Homophony by Henry Parcel p. 130-138 4. Tradition of Western Music, "The Dynamic Synthesis" by Gerald Abraham, London, Stainer and Bell 1976 p.23-24 5. Tradition Anxiety and the Musical scene Henry Parcel. London, Macmilan 1985 p. 66-67