The index of holomorphic vector fields on singular varieties I
Complex analytic methods in dynamical systems - IMPA, January 1992, Astérisque, no. 222 (1994), pp. 9-35 
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     author = {Bonatti, Ch. and G\'omez-Mont, X.},
     title = {The index of holomorphic vector fields on singular varieties {I}},
     booktitle = {Complex analytic methods in dynamical systems - IMPA, January 1992},
     editor = {Camacho C. and Lins Neto A. and Moussu R. and Sad P.},
     series = {Ast\'erisque},
     pages = {9--35},
     year = {1994},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {222},
     language = {en},
     url = {https://www.numdam.org/item/AST_1994__222__9_0/}
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Bonatti, Ch.; Gómez-Mont, X. The index of holomorphic vector fields on singular varieties I, dans Complex analytic methods in dynamical systems - IMPA, January 1992, Astérisque, no. 222 (1994), pp. 9-35. https://www.numdam.org/item/AST_1994__222__9_0/

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