@article{10_4064_aa145_1_5,
     author = {Jordi Gu\`ardia and Jes\'us Montes and Enric Nart},
     title = {Okutsu invariants and {Newton} polygons},
     journal = {Acta Arithmetica},
     pages = {83--108},
     publisher = {mathdoc},
     volume = {145},
     number = {1},
     year = {2010},
     doi = {10.4064/aa145-1-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa145-1-5/}
}