@article{10_4064_fm177_3_5,
     author = {Carles Bivi\`a-Ausina},
     title = {The index of analytic vector fields and
 {Newton} polyhedra},
     journal = {Fundamenta Mathematicae},
     pages = {251--267},
     publisher = {mathdoc},
     volume = {177},
     number = {3},
     year = {2003},
     doi = {10.4064/fm177-3-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm177-3-5/}
}