@article{10_4171_dm_436,
     author = {Olivier Haution},
     title = {Invariants of upper motives},
     journal = {Documenta mathematica},
     pages = {1555--1572},
     year = {2013},
     volume = {18},
     doi = {10.4171/dm/436},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/436/}
}