Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 韓 尚憲 and Hirotaka Matsumoto,"The Existence of The Environment-Dependent Optimal (s, S) Policy",NUCB journal of economics and information science = 名古屋商科大学論集,13466097,日進 : 名古屋商科大学総合経営・経営情報学部,2004-07,49,1,127-140,https://cir.nii.ac.jp/crid/1520009407810730240,