TY - JOUR AU - Tan, Bo AU - Wen, Zhi-Ying TI - Periodicity problem of substitutions over ternary alphabets JO - RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications PY - 2008 SP - 747 EP - 762 VL - 42 IS - 4 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/ita:2007057/ DO - 10.1051/ita:2007057 LA - en ID - ITA_2008__42_4_747_0 ER -