@article{oai:air.repo.nii.ac.jp:00005087,
 author = {佐伯, 卓也 and SAEKI, Takuya},
 issue = {21},
 journal = {東北数学教育学会年報, Journal of Tohoku Society of Mathematics Education},
 month = {Mar},
 pages = {29--37},
 title = {カバリエリの原理：中学生対象の数学教材パソコンソフト開発とその授業の実際},
 year = {1990}
}