@article{10_4171_ggd_362,
     author = {Rami Luisto and Pekka Pankka},
     title = {Rigidity of extremal quasiregularly elliptic manifolds},
     journal = {Groups, geometry, and dynamics},
     pages = {723--732},
     year = {2016},
     volume = {10},
     number = {2},
     doi = {10.4171/ggd/362},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/362/}
}