@article{oai:tsukuba.repo.nii.ac.jp:00015885,
 author = {Irokawa, Susumu and Sasaki, Ryuji},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {185--192},
 title = {A remark on Artin-Schreier curves whose Hasse-Witt maps are the zero maps},
 volume = {15},
 year = {1991}
}