@article{oai:soar-ir.repo.nii.ac.jp:00017481,
 author = {西川,  耿},
 journal = {信州大学教養部紀要.},
 month = {Mar},
 note = {Article, 信州大学教養部紀要. 24: 155-166(1990)},
 pages = {155--166},
 title = {凸関数の理論},
 volume = {24},
 year = {1990}
}