@article{CMJ_2007__57_4_a12,
     author = {Koprowski, Przemys{\l}aw},
     title = {Graded quaternion symbol equivalence of function fields},
     journal = {Czechoslovak Mathematical Journal},
     pages = {1311--1319},
     publisher = {mathdoc},
     volume = {57},
     number = {4},
     year = {2007},
     mrnumber = {2357592},
     zbl = {1190.11029},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2007__57_4_a12/}
}