Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SHOUDA Kazushi and SANO Shin-ichi and KARIYA Komyo and NAKANISHI Tsunehiko,Estimation of the Density Field of Automobile Traffic Flow at the Bottleneck,"Transactions of the Institute of Systems, Control and Information Engineers",13425668,"THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE)",1993,6,8,381-386,https://cir.nii.ac.jp/crid/1390282680142215680,https://doi.org/10.5687/iscie.6.381