@article{weko_11882_1,
   author	 = "Toru,Nakanishi and Yuji,Sugiyama",
   title	 = "Group Signature Scheme with Signature Tracing and Its Application to an Electronic Coupon System",
   journal	 = "情報処理学会論文誌",
   year 	 = "2001",
   volume	 = "42",
   number	 = "8",
   pages	 = "2030--2039",
   month	 = "aug"
}