Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 阿部 文俊 and 三澤 秀樹,The Current Mobile Phone Measures of Railway Tunnel in East Japan Railway Company,The Journal of the Institute of Electrical Installation Engineers of Japan,09100350,The Institute of Electrical Installation Engineers of Japan,2014,34,2,102-105,https://cir.nii.ac.jp/crid/1390001205744065280,https://doi.org/10.14936/ieiej.34.102