@article{oai:juen.repo.nii.ac.jp:00005122,
 author = {布川,  和彦},
 issue = {25},
 journal = {上越数学教育研究, Joetsu journal of mathematics education},
 month = {Mar},
 pages = {1--10},
 title = {数量関係の学習と背後の現象や共変性の意識化},
 year = {2010}
}