@article{10_4153_CJM_2000_036_0,
     author = {Min\'a\v{c}, J\'an and Smith, Tara L.},
     title = {W-Groups under {Quadratic} {Extensions} of {Fields}},
     journal = {Canadian journal of mathematics},
     pages = {833--848},
     year = {2000},
     volume = {52},
     number = {4},
     doi = {10.4153/CJM-2000-036-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2000-036-0/}
}