@techreport{weko_175993_1,
   author	 = "Hiroki,Katsumata and Satoshi,Tayu and Shuichi,Ueno",
   title	 = "On the Complexity of Finding a Largest Common Subtree of Trees",
   year 	 = "2016",
   institution	 = "Department of Information and Communications Engineering Tokyo Institute of Technology, Department of Information and Communications Engineering Tokyo Institute of Technology, Department of Information and Communications Engineering Tokyo Institute of Technology",
   number	 = "16",
   month	 = "nov"
}