@article{oai:u-nagano.repo.nii.ac.jp:00000421,
 author = {清水, 道夫 and Shimizu, Michio},
 journal = {長野県短期大学紀要, Journal of Nagano Prefectural College},
 month = {Dec},
 note = {40002771498, application/pdf},
 pages = {73--76},
 title = {ある種の最適2-3木},
 volume = {46},
 year = {1991},
 yomi = {シミズ, ミチオ}
}