@article{PMIHES_2019__130__63_0,
     author = {Benoist, Olivier},
     title = {The period-index problem for real surfaces},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {63--110},
     publisher = {Springer Berlin Heidelberg},
     address = {Berlin/Heidelberg},
     volume = {130},
     year = {2019},
     doi = {10.1007/s10240-019-00108-7},
     mrnumber = {4028514},
     zbl = {1442.14073},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10240-019-00108-7/}
}