Bo Tan, Zhi-Ying Wen. Periodicity Problem of Substitutions over Ternary Alphabets. ITA, 42(4):747-762, 2008. [doi]
@article{TanW08-2, title = {Periodicity Problem of Substitutions over Ternary Alphabets}, author = {Bo Tan and Zhi-Ying Wen}, year = {2008}, doi = {10.1051/ita:2007057}, url = {http://dx.doi.org/10.1051/ita:2007057}, researchr = {https://researchr.org/publication/TanW08-2}, cites = {0}, citedby = {0}, journal = {ITA}, volume = {42}, number = {4}, pages = {747-762}, }