@article{oai:tsukuba.repo.nii.ac.jp:00047895,
 author = {Tagawa, Hiromichi and Umemura, Masayuki and 梅村, 雅之},
 issue = {1},
 journal = {The Astrophysical journal},
 month = {Mar},
 title = {Merger of Multiple Accreting Black Holes Concordant with Gravitational-wave Events},
 volume = {856},
 year = {2018}
}