@article{oai:u-fukui.repo.nii.ac.jp:00019986,
 author = {TAURA, Hideyuki},
 journal = {福井医科大学一般教育紀要},
 month = {Dec},
 pages = {63--71},
 title = {On Existence of a Critical Period for Language Acquisition},
 volume = {19},
 year = {1999}
}