Combination of Machine Learning Methods for Optimum Chinese Word Segmentation. - Masayuki Asahara; Kenta Fukuoka; Ai Azuma; Chooi-Ling Goh; Yotaro Watanabe; Yuji Matsumoto 001; Takashi Tsuzuki (SIGHAN@IJCNLP 2005, 2005)

A Generalization of Forward-backward Algorithm. - Ai Azuma; Yuji Matsumoto 001 (Inf. Media Technol., 2010)

Multilayer Sequence Labeling. - Ai Azuma; Yuji Matsumoto 001 (EMNLP, 2011)

Construction of English MWE Dictionary and its Application to POS Tagging. - Yutaro Shigeto; Ai Azuma; Sorami Hisamoto; Shuhei Kondo; Tomoya Kouse; Keisuke Sakaguchi; Akifumi Yoshimoto; Frances Yung; Yuji Matsumoto 001 (MWE@NAACL-HLT, 2013)

An Algebraic Formalization of Forward and Forward-backward Algorithms. - Ai Azuma; Masashi Shimbo; Yuji Matsumoto 001 (CoRR, 2017)