@article{10_4171_dm_129,
     author = {Alexander Merkurjev and Nikita Karpenko},
     title = {Rost projectors and {Steenrod} operations},
     journal = {Documenta mathematica},
     pages = {481--493},
     year = {2002},
     volume = {7},
     doi = {10.4171/dm/129},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/129/}
}