@incollection{MSMF_1976__48__47_0,
     author = {Laborde, O.},
     title = {Classes de {Stiefel-Whitney} en cohomologie \'etale},
     booktitle = {Colloque sur les formes quadratiques (Montpellier, 1975)},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {47--51},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {48},
     year = {1976},
     doi = {10.24033/msmf.201},
     mrnumber = {58 #27985},
     zbl = {0347.14012},
     url = {http://archive.numdam.org/articles/10.24033/msmf.201/}
}