@article{weko_217591_1,
   author	 = "Shunpei,Yamaguchi and Shusuke,Ohtawa and Ritsuko,Oshima and Jun,Oshima and Takuya,Fujihashi and Shunsuke,Saruwatari and Takashi,Watanabe",
   title	 = "An IoT System with Business Card-Type Sensors for Collaborative Learning Analysis ",
   journal	 = "情報処理学会論文誌",
   year 	 = "2022",
   volume	 = "63",
   number	 = "3",
   month	 = "mar"
}