%0 Journal Article %A Daniel Barlet %T New singularity invariants: the sheaf β_X^•'' %J Journal of Singularities %D 2021 %P 19-32 %V 23 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.5427/jsing.2021.23c/ %R 10.5427/jsing.2021.23c %F 10_5427_jsing_2021_23c