On the complexity of computing the order of repetition of a string

Juhani Karhumäki, Wojciech Plandowski. On the complexity of computing the order of repetition of a string. In Grzegorz Rozenberg, Wolfgang Thomas, editors, Developments in Language Theory, Foundations, Applications, and Perspectives, Aachen, Germany, 6-9 July 1999. pages 178-184, World Scientific, 1999.

@inproceedings{KarhumakiP99,
  title = {On the complexity of computing the order of repetition of a string},
  author = {Juhani Karhumäki and Wojciech Plandowski},
  year = {1999},
  researchr = {https://researchr.org/publication/KarhumakiP99},
  cites = {0},
  citedby = {0},
  pages = {178-184},
  booktitle = {Developments in Language Theory, Foundations, Applications, and Perspectives, Aachen, Germany, 6-9 July 1999},
  editor = {Grzegorz Rozenberg and Wolfgang Thomas},
  publisher = {World Scientific},
  isbn = {981-02-4380-4},
}