1. “Romanticism.”http://www.oxfordmusiconline.com/subscriber/article/grove/music/23751
2. Programming the Absolute: Nineteenth Century German Music and the Hermeneutics of the Moment;Berthold,2002
3. Religions, Values, and Peak Experiences;Abraham,1970
4. “Strong Experiences with Music.”;Alf,2010
5. The Phenomenology of Aesthetic Peak Experiences