@article{10_4171_ggd_136,
     author = {Nikolay Nikolov and Dan Segal},
     title = {Powers in finite groups},
     journal = {Groups, geometry, and dynamics},
     pages = {501--507},
     year = {2011},
     volume = {5},
     number = {2},
     doi = {10.4171/ggd/136},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/136/}
}