@techreport{weko_176534_1,
   author	 = "Toshihiro,Akagi and Tetsuya,Araki and Shin-ichi,Nakano",
   title	 = "Variants of the dispersion problem",
   year 	 = "2017",
   institution	 = "Department of Computer Science, Gunma University, National Institute of Informatics, Department of Computer Science, Gunma University",
   number	 = "8",
   month	 = "jan"
}