The ambiguity of the-te iru form in Japanese 論文 OGIHARA T.・Toshiyuki Ogihara ·1998 ·『Journal of East Asian Linguistics』 7(2) pp. 87-120 doi:10.1023/a:1008208219882
Semantic properties of the so-called past tense morpheme in Late Late Middle Japanese 論文 Toshiyuki Ogihara・Takenobu Fukushima ·2014-07-15 ·『Journal of East Asian Linguistics』 24(1) pp. 75-112 doi:10.1007/s10831-014-9124-8