Trapezoidal DP matching with time reversibility. - Masaaki Okochi; Toshiyuki Sakai (ICASSP, 1982)

Isolated word recognition using hidden Markov models. - Kazuhide Sugawara; Masafumi Nishimura; Koichi Toshioka; Masaaki Okochi; Toyohisa Kaneko (ICASSP, 1985)