@article{10_1090_S0894_0347_99_00293_3,
     author = {Goncharov, Alexander},
     title = {Volumes of hyperbolic manifolds and mixed {Tate} motives},
     journal = {Journal of the American Mathematical Society},
     pages = {569--618},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {1999},
     doi = {10.1090/S0894-0347-99-00293-3},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-99-00293-3/}
}