@article{FPM_2013_18_4_a2,
     author = {E. I. Bunina and D. V. Trushin and M. V. Tsvetkov},
     title = {Decomposition of unitary linear groups into products of free factors},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {33--39},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2013_18_4_a2/}
}