@techreport{weko_61871_1,
   author	 = "Yiping,Zhao and Jun,Ohya",
   title	 = "Stakeholder System and Analysis of Extended Producer Responsibility Based on Game Theory",
   year 	 = "2009",
   institution	 = "Graduate School of Global Information and Telecommunication Studies, Waseda University, Graduate School of Global Information and Telecommunication Studies, Waseda University",
   number	 = "32(2009-IS-107)",
   month	 = "mar"
}