1. D.G. Panagiotopoulos, Theory and Practice of the Church Byzantine Music, 1991.
2. The Parasimantiki of the Byzantine Music;Psachos,1978
3. D. Pruslin, Automatic recognition of sheet music, Sc. D. Dissertation, Massachusetts Institute of Technology, 1966.
4. D.S. Prerau, Computer pattern recognition of standard engraved music notation, Ph.D. Thesis, Massachusetts Institute of Technology, 1970.
5. D.S. Prerau, Computer pattern recognition on printed music, in Proceedings of the Fall Joint Computer Conf. Montvale, NJ, 1971, pp. 153–162.