@article{MZM_1993_53_5_a13,
     author = {A. A. Tuganbaev},
     title = {Generalized quaternion algebras},
     journal = {Matemati\v{c}eskie zametki},
     pages = {120--128},
     year = {1993},
     volume = {53},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1993_53_5_a13/}
}