@article{oai:icu.repo.nii.ac.jp:00004685,
 author = {Sudo, Yasutada and Uegaki, Wataru},
 journal = {ICUWPL},
 month = {Jun},
 pages = {57--62},
 title = {Question Marker Drop in Japanese and Generalized Factivity},
 volume = {7},
 year = {2018}
}