@article{DOCMA_2010__S4__a10,
     author = {Karpenko, Nikita A.},
     title = {Hyperbolicity of orthogonal involutions},
     journal = {Documenta mathematica},
     pages = {371--392},
     publisher = {mathdoc},
     volume = {Andrei A. Suslin's Sixtieth Birthday},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_2010__S4__a10/}
}