@article{IM2_1989_32_2_a3,
     author = {A. S. Merkur'ev},
     title = {The group $SK_2$ for quaternion algebras},
     journal = {Izvestiya. Mathematics },
     pages = {313--337},
     publisher = {mathdoc},
     volume = {32},
     number = {2},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1989_32_2_a3/}
}