@article{DAN_1980_252_3_a6,
     author = {G. A. Margulis},
     title = {On the multiplicative group of a quaternion algebra over a global field},
     journal = {Doklady Akademii Nauk},
     pages = {542--546},
     publisher = {mathdoc},
     volume = {252},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_252_3_a6/}
}