@article{weko_101731_1,
   author	 = "Nariyoshi,Yamai and Masayuki,Matsuoka and Kiyohiko,Okayama and Keita,Kawano and Motonori,Nakamura and Masato,Minda",
   title	 = "Domain Registration Date Retrieval System for Improving Spam Mail Discrimination",
   journal	 = "情報処理学会論文誌",
   year 	 = "2014",
   volume	 = "55",
   number	 = "6",
   month	 = "jun"
}