@phdthesis{oai:u-ryukyu.repo.nii.ac.jp:02012054,
 author = {天願, 健 and Tengan, Takeshi},
 month = {Mar},
 note = {学位論文},
 school = {琉球大学},
 title = {A Study on Petri Net-based Formulation and Iterative Optimization for Integer Linear programming},
 year = {2019}
}