@book{CTT100702078,
  author = {Hilofumi Yamamoto},
  title = {Study of Language Using Japanese Historical Corpora},
  publisher = {Hitzuji Shobo},
  year = 2015,
}

@article{CTT100702077,
  author = {Eriko Takahashi and Yukiko Hatasa and Hilofumi Yamamoto and Shin-ichi Maekawa and Kazumi Hatasa},
  title = {The development of an automatic evaluation system of L2 pronunciation in Japanese},
  journal = {IPSJ Symposium Series. Vol. 2015},
  year = 2015,
}

@article{CTT100702076,
  author = {高橋 恵利子 and 畑佐 由紀子 and Hilofumi Yamamoto and Shin-ichi Mayekawa and 畑佐 一味},
  title = {外国人日本語学習者の発音能力を測定するシステムの開発},
  journal = {JPSJ SIG Technical Report},
  year = 2015,
}