E. Nakamura, K. Yoshii, S. Sagayama, "Rhythm Transcription of Polyphonic Piano Music Based on Merged-Output HMM for Multiple Voices," IEEE/ACM Transactions on Audio, Speech and Language Processing, Vol. 25, No. 4, pp. 794-806, 2017. [arXiv:1701.08343]

\bibitem{2017PolyphonicRhythmTranscription}
E.~Nakamura, K.~Yoshii, and S.~Sagayama,
``Rhythm Transcription of Polyphonic Piano Music Based on Merged-Output HMM for Multiple Voices,''
{\it IEEE/ACM TASLP}, Vol.~25, No.~4, pp.~794--806, 2017.