@article{10_4064_aa160_4_4,
     author = {Beata Rothkegel},
     title = {The image of the natural homomorphism of {Witt} rings of orders in a global field},
     journal = {Acta Arithmetica},
     pages = {349--384},
     publisher = {mathdoc},
     volume = {160},
     number = {4},
     year = {2013},
     doi = {10.4064/aa160-4-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa160-4-4/}
}