@article{SM_2011_202_4_a2,
     author = {A. I. Efimov},
     title = {A proof of the {Kontsevich-Soǐbel'man} conjecture},
     journal = {Sbornik. Mathematics},
     pages = {527--546},
     year = {2011},
     volume = {202},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2011_202_4_a2/}
}