Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Masashi Miwa and Tatsuo Oyama,All-integer type linear programming model analyses for the optimal railway track maintenance scheduling,OPSEARCH,0030-3887,Springer Science and Business Media LLC,2004-09,41,3,155-164,https://cir.nii.ac.jp/crid/1362262945483676160,https://doi.org/10.1007/bf03398841