ICASSP '77. IEEE International Conference on Acoustics, Speech, and Signal Processing Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '77.. 2:583-586 1977
ICASSP '86. IEEE International Conference on Acoustics, Speech, and Signal Processing Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '86.. 11:61-64 1986