@article{oai:tsukuba.repo.nii.ac.jp:00034518,
 author = {吉田, 健一 and YOSHIDA, Kenichi and 元田, 浩},
 issue = {1},
 journal = {人工知能学会誌, Journal of Japanese Society for Artificial Intelligence},
 month = {Jan},
 pages = {69--76},
 title = {「近似」に基づく階層的知識表現},
 volume = {7},
 year = {1992},
 yomi = {ヨシダ, ケンイチ}
}