@techreport{weko_191033_1,
   author	 = "Takehiro,Ito and Naonori,Kakimura and Yusuke,Kobayashi",
   title	 = "On the Multi-Service Center Problem",
   year 	 = "2018",
   institution	 = "Graduate School of Information Sciences, Tohoku University, Department of Mathematics, Keio University, Research Institute for Mathematical Sciences, Kyoto University",
   number	 = "2",
   month	 = "aug"
}