@article{oai:ksu.repo.nii.ac.jp:00001610,
 author = {伊藤, 正美 and ITO, Masami},
 journal = {京都産業大学論集. 自然科学系列},
 month = {Mar},
 note = {In the present paper,we prove that the n-bounded duplication closure of a regular language is regular for n=1,2.},
 pages = {1--5},
 title = {正規言語の重複閉包},
 volume = {39},
 year = {2010}
}