著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Roar Adland and Haiying Jia,Dynamic speed choice in bulk shipping,Maritime Economics & Logistics,1479-2931,Springer Science and Business Media LLC,2016-07-13,20,2,253-266,https://cir.nii.ac.jp/crid/1364233270726814976,https://doi.org/10.1057/s41278-016-0002-3