@article{10_4064_aa102_4_4,
     author = {Ilaria Del Corso and Roberto Dvornicich},
     title = {Number fields with the same index},
     journal = {Acta Arithmetica},
     pages = {323--337},
     publisher = {mathdoc},
     volume = {102},
     number = {4},
     year = {2002},
     doi = {10.4064/aa102-4-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa102-4-4/}
}