Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Shioda Shigeo and Ohtsuka Kenji and Machihara Fumiaki,A FINITE POPULATION MODEL AND PRODUCT-FORM APPROXIMATION FOR CELLULAR MOBILE SYSTEMS WITH TRAVELING USERS(the 50th Anniversary of the Operations Research Society of Japan),Journal of the Operations Research Society of Japan,04534514,The Operations Research Society of Japan,2007,50,4,404-427,https://cir.nii.ac.jp/crid/1390282679086882688,https://doi.org/10.15807/jorsj.50.404