@techreport{weko_203740_1,
   author	 = "Yuma,Tamura and Takehiro,Ito and Xiao,Zhou",
   title	 = "Approximation of the Independent Feedback Vertex Set Problem",
   year 	 = "2020",
   institution	 = "Graduate School of Information Sciences, Tohoku University, Graduate School of Information Sciences, Tohoku University, Graduate School of Information Sciences, Tohoku University",
   number	 = "10",
   month	 = "mar"
}