C. Chafe, D. Jaffe " Source Separation and Note Identification in Polyphonic Music" Proc. IEEE Conf. Acoust. Sp. and Sig. Proc., 2: 25.6.1–25.6.4, Tokyo, 1986 download
C. Chafe, D. Jaffe, et al. "Techniques for Note Identification in Polyphonic Music" Proc. Intl. Computer Music Conf, Vancouver, 1985 download