Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 川井 勇雄 and 降旗 敏勝,Technological Innovation of Information Systems Changes Railway Exploitation. Passenger Interface System.,The Journal of The Institute of Electrical Engineers of Japan,13405551,The Institute of Electrical Engineers of Japan,1999,119,2,90-92,https://cir.nii.ac.jp/crid/1390001204660818048,https://doi.org/10.1541/ieejjournal.119.90