@article{AIF_1985__35_2_13_0,
     author = {Robba, Philippe},
     title = {Indice d{\textquoteright}un op\'erateur diff\'erentiel $p$-adique {IV.} {Cas} des syst\`emes. {Mesure} de l{\textquoteright}irr\'egularit\'e dans un disque},
     journal = {Annales de l'Institut Fourier},
     pages = {13--55},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {35},
     number = {2},
     year = {1985},
     doi = {10.5802/aif.1008},
     zbl = {0548.12016},
     mrnumber = {86j:12012},
     language = {fr},
     url = {https://aif.centre-mersenne.org/articles/10.5802/aif.1008/}
}