@article{MAN_1989__283_1_164520,
     author = {C. Riehm},
     title = {The {Quadratic} {Schur} {Subgroup} over {Local} and {Global} {Fields.}},
     journal = {Mathematische Annalen},
     pages = {479--490},
     publisher = {mathdoc},
     volume = {283},
     number = {1},
     year = {1989},
     zbl = {0642.12013},
     url = {http://geodesic.mathdoc.fr/item/MAN_1989__283_1_164520/}
}