@article{oai:ipsj.ixsq.nii.ac.jp:00113096,
 author = {久保田, 雅人 and KUBOTA, Masato},
 issue = {3},
 journal = {情報処理},
 month = {Feb},
 title = {子供と遊びと「もったいない」について},
 volume = {56},
 year = {2015}
}