@article{oai:akita.repo.nii.ac.jp:00000008,
 author = {Haga, Yoshinori},
 journal = {研究紀要},
 month = {Mar},
 note = {2, KJ00003572078, 論文, Article},
 pages = {12--16},
 title = {Σ-Symmetric Spaces and the Closed Graph Theorem},
 volume = {1},
 year = {1966}
}