著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) NEUMAN D.,Early Learning and Awareness of Division : A Phenomenographic Approach,Educational Studies in Mathematics,,,1999,40,,101-128,https://cir.nii.ac.jp/crid/1570009750864427520,