@article{oai:nifs-repository.repo.nii.ac.jp:00008920,
 author = {Todoroki,  J.},
 journal = {Annual Report of National Institute for Fusion Science},
 month = {2016-03-14},
 title = {Calculating Rotational Transform Following Field Line},
 volume = {Annual Report Apr.2002 - Mar.2003},
 year = {}
}