Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yao Yusaku and Tanaka Ken-ichi,MATHEMATICAL MODEL FOR ROUTE GUIDANCE—DEVELOPING A GUIDE SIGN LOCATION AND ROUTING PROBLEM—,Transactions of the Operations Research Society of Japan,13498940,The Operations Research Society of Japan,2020,63,0,18-37,https://cir.nii.ac.jp/crid/1390286981363197824,https://doi.org/10.15807/torsj.63.18