@article{IM_1979__51_142622,
     author = {T.Y. Lam and R. Elman and A.R. Wadsworth},
     title = {Function {Fileds} of {Pfister} {Forms.}},
     journal = {Inventiones mathematicae},
     pages = {61--76},
     publisher = {mathdoc},
     volume = {51},
     year = {1979},
     zbl = {0395.10028},
     url = {http://geodesic.mathdoc.fr/item/IM_1979__51_142622/}
}