@article{ASENS_1999_4_32_1_71_0,
     author = {Ojanguren, Manuel and Panin, Ivan},
     title = {A purity theorem for the {Witt} group},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {71--86},
     publisher = {Elsevier},
     volume = {Ser. 4, 32},
     number = {1},
     year = {1999},
     doi = {10.1016/s0012-9593(99)80009-3},
     mrnumber = {2000a:11057},
     zbl = {0980.11025},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/s0012-9593(99)80009-3/}
}