@article{MZM_2002_72_5_a8,
     author = {V. A. Krasnov},
     title = {The {Brauer} and {Witt} {Groups} of {Real} {Ruled} {Surfaces}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {706--714},
     publisher = {mathdoc},
     volume = {72},
     number = {5},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2002_72_5_a8/}
}