@article{oai:tohoku.repo.nii.ac.jp:00011169,
 author = {Hasegawa, Akira and Hamaguchi, Hiroyuki},
 issue = {3},
 journal = {Science reports of the Tohoku University. Ser. 5, Geophysics},
 month = {Dec},
 note = {application/pdf, 紀要類 (bulletin), 1277115 bytes},
 pages = {135--144},
 title = {On the Masking Effect by the Successive Occurrence of Earthquakes on Time Interval Distribution},
 volume = {20},
 year = {1970}
}