@article{MZ_1990__204_3_183780,
     author = {Martha Rzedowski Calder\'on},
     title = {Galois {Module} {Structure} of {Rings} of {Intergers.}},
     journal = {Mathematische Zeitschrift},
     pages = {401--424},
     publisher = {mathdoc},
     volume = {204},
     number = {3},
     year = {1990},
     zbl = {0682.12003},
     url = {http://geodesic.mathdoc.fr/item/MZ_1990__204_3_183780/}
}