@phdthesis{oai:tohoku.repo.nii.ac.jp:00138007,
 author = {Itsna, Khoirul Fitriana},
 month = {2022-07-29, 2022-07-29, 2022-09-15, 2022-09-15},
 note = {博士学位論文 (Thesis(doctor))},
 school = {Tohoku University},
 title = {X-ray Selected Narrow-Line Active Galactic Nuclei in the COSMOS Field: Nature of Optically Dull Active Galactic Nuclei},
 year = {}
}