@article{10_4171_dm_492,
     author = {Benjamin Antieau and Ben Williams},
     title = {Topology and purity for torsors},
     journal = {Documenta mathematica},
     pages = {333--355},
     year = {2015},
     volume = {20},
     doi = {10.4171/dm/492},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/492/}
}