Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) OKUBO Kazuaki and CHUN Pang-jo and YAGASAKI Mika,COMBINATORIAL OPTIMIZATION PROBLEM FOR WASTED PLASTIC BOTTLE RECYCLING BY USING AUCTION DATA,"Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)",2185-6540,Japan Society of Civil Engineers,2018,74,5,I_293-I_301,https://cir.nii.ac.jp/crid/1390001288108251520,https://doi.org/10.2208/jscejipm.74.i_293