@article{10_1090_S0894_0347_1991_1102577_2,
     author = {Bloch, Spencer},
     title = {Algebraic cycles and the {Lie} algebra of mixed {Tate} motives},
     journal = {Journal of the American Mathematical Society},
     pages = {771--791},
     publisher = {mathdoc},
     volume = {04},
     number = {4},
     year = {1991},
     doi = {10.1090/S0894-0347-1991-1102577-2},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1991-1102577-2/}
}