%0 Journal Article %A Chaubard, Laura %A Costa, Alfredo %T A new algebraic invariant for weak equivalence of sofic subshifts %J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications %D 2008 %P 481-502 %V 42 %N 3 %I EDP-Sciences %U http://archive.numdam.org/articles/10.1051/ita:2008015/ %R 10.1051/ita:2008015 %G en %F ITA_2008__42_3_481_0