@article{MZ_1991__208_3_174314,
     author = {B. Erez},
     title = {The {Galois} sturcture of the square root of the inverse different.},
     journal = {Mathematische Zeitschrift},
     pages = {239--256},
     publisher = {mathdoc},
     volume = {208},
     number = {3},
     year = {1991},
     zbl = {0713.11078},
     url = {http://geodesic.mathdoc.fr/item/MZ_1991__208_3_174314/}
}