@article{10_4064_aa114_4_4,
     author = {J.-M. Couveignes and Nicolas Ros},
     title = {Des obstructions globales \`a  la descente des rev\^etements},
     journal = {Acta Arithmetica},
     pages = {331--348},
     publisher = {mathdoc},
     volume = {114},
     number = {4},
     year = {2004},
     doi = {10.4064/aa114-4-4},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa114-4-4/}
}