@article{oai:barrel.repo.nii.ac.jp:00001036,
 author = {Iida, Hiroshi},
 issue = {1},
 journal = {商学討究},
 month = {Jul},
 note = {論説},
 pages = {415--421},
 title = {Notes on polynomially solvable special cases for the unbounded knapsack problem},
 volume = {53},
 year = {2002}
}