@article{MZ_1988__198_3_173942,
     author = {Victoria Powers},
     title = {Higher {Level} {Reduced} {Witt} {Rings} of {Skew} {Fields.}},
     journal = {Mathematische Zeitschrift},
     pages = {545--554},
     publisher = {mathdoc},
     volume = {198},
     number = {3},
     year = {1988},
     zbl = {0627.10014},
     url = {http://geodesic.mathdoc.fr/item/MZ_1988__198_3_173942/}
}