@article{oai:repository.dl.itc.u-tokyo.ac.jp:00022256,
 author = {坪井, 善勝},
 issue = {7},
 journal = {生産研究},
 month = {Jul},
 note = {application/pdf},
 pages = {313--343},
 title = {退官記念講演 : 平面および曲面問題の追究},
 volume = {20},
 year = {1968}
}