Crowdsourced Corpus of Sentence Simplification with Core Vocabulary. - Akihiro Katsuta; Kazuhide Yamamoto (LREC, 2018)

Improving text simplification by corpus expansion with unsupervised learning. - Akihiro Katsuta; Kazuhide Yamamoto (IALP, 2019)

Lexical Simplification by Unsupervised Machine Translation. - Akihiro Katsuta; Kazuhide Yamamoto (Int. J. Asian Lang. Process., 2020)