@techreport{weko_145819_1,
   author	 = "Akira,Matsubayashi",
   title	 = "Better Online Steiner Trees on Outerplanar Graphs",
   year 	 = "2015",
   institution	 = "Division of Electrical Engineering and Computer Science, Kanazawa University",
   number	 = "2",
   month	 = "nov"
}