1. Scientific method in Ptolemy’s Harmonics;Barker,2000
2. The science of harmonics in Classical Greece;Barker,2007
3. Creese, D. E. (2009). The monochord in Greek harmonic science. Cambridge: Cambridge University Press, in press.
4. Ptolemy. (1930). Die Harmonielehre des Klaudios Ptolemaios (I. Düring, Ed.). Göteborgs Högskolas Arsskrift, 36. Göteborg: Elanders boktr. aktiebolag.
5. Ptolemy. (1989). Harmonics. In A. Barker (Ed.), Greek musical writings, Vol. 2. Harmonic and acoustic theory (pp. 270–391). Cambridge: Cambridge University Press.