@misc{oai:niigata-u.repo.nii.ac.jp:00033973,
 author = {Hasegawa, Sumito},
 month = {2020-08-31, 2020-08-31},
 note = {新大院博(理)甲第450号},
 title = {On the rationality problem for norm one tori},
 year = {}
}