@article{oai:ynu.repo.nii.ac.jp:00008701,
 author = {Nakanishi, Noboru},
 issue = {1&2},
 journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学},
 month = {Dec},
 pages = {9--22},
 title = {A problem dual to solving the linear differential equation},
 volume = {57},
 year = {2011}
}