@article{oai:nifs-repository.repo.nii.ac.jp:00004737, author = {Hudson, S.R. and Nakajima, N. and Hegna, C.C.}, journal = {Annual Report of National Institute for Fusion Science}, month = {2016-03-15}, title = {The Second Stability of the High-n Ballooning Modes in Heliotrons}, volume = {Annual Report Apr.2004 - Mar.2005}, year = {} }