@article{MZM_2000_68_1_a4,
     author = {A. A. Bondarenko},
     title = {Class numbers of classical groups},
     journal = {Matemati\v{c}eskie zametki},
     pages = {49--56},
     publisher = {mathdoc},
     volume = {68},
     number = {1},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2000_68_1_a4/}
}