@article{10_4064_aa_64_4_303_323,
     author = {Piotr Jaworski},
     title = {Quadratic field extensions and residue homomorphisms of {Witt} rings},
     journal = {Acta Arithmetica},
     pages = {303--323},
     publisher = {mathdoc},
     volume = {64},
     number = {4},
     year = {1993},
     doi = {10.4064/aa-64-4-303-323},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-64-4-303-323/}
}