@article{10_1090_S0894_0347_01_00365_4,
     author = {Chernousov, Vladimir and Merkurjev, Alexander},
     title = {{\dh}‘…-equivalence in spinor groups},
     journal = {Journal of the American Mathematical Society},
     pages = {509--534},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {2001},
     doi = {10.1090/S0894-0347-01-00365-4},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-01-00365-4/}
}