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2. Junibakti Sanubari, Keiichi Tokuda, Mahoki Onoda, “Robust recursive time series modeling based on an AR model excited by a t-distribution process,” IEEE Trans. Signal Proces., vol.46, no.1, pp.218–222, Jan. 1998.

3. 徳田 恵一, 小林 隆夫, 今井 聖, “メル一般化ケプストラムの 再帰的計算法,”電子情報通信学会論文誌(A), vol.J71-A, no.1, pp.128–131, Jan. 1988.