@article{GT_2014_18_2_a12,
     author = {Antieau, Benjamin and Williams, Ben},
     title = {The period-index problem for twisted topological {K{\textendash}theory}},
     journal = {Geometry & topology},
     pages = {1115--1148},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {2014},
     doi = {10.2140/gt.2014.18.1115},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2014.18.1115/}
}