@article{oai:tsukuba.repo.nii.ac.jp:00003950,
 journal = {年次研究報告, Annual report of Institute of Physics, the University of Tsukuba},
 month = {},
 pages = {29--39},
 title = {III. 宇宙物理グループ},
 volume = {1999},
 year = {2000}
}