Julien Cassaigne. Subword complexity and periodicity in two or more dimensions. In Grzegorz Rozenberg, Wolfgang Thomas, editors, Developments in Language Theory, Foundations, Applications, and Perspectives, Aachen, Germany, 6-9 July 1999. pages 14-21, World Scientific, 1999.
@inproceedings{Cassaigne99:1, title = {Subword complexity and periodicity in two or more dimensions}, author = {Julien Cassaigne}, year = {1999}, researchr = {https://researchr.org/publication/Cassaigne99%3A1}, cites = {0}, citedby = {0}, pages = {14-21}, 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}, }