Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) ENTA Atsushi and OTSUKA Yuji and WATANABE Hitoshi,MONITORING OF CONTACT BEHAVIOR BY USING RING-TYPE RFID READER,Journal of Architecture and Planning (Transactions of AIJ),1340-4210,Architectural Institute of Japan,2009,74,646,2739-2744,https://cir.nii.ac.jp/crid/1390282679755484032,https://doi.org/10.3130/aija.74.2739