@article{10_4171_ggd_375,
     author = {Matthew C.H. Tointon},
     title = {Characterisations of algebraic properties of groups in terms of harmonic functions},
     journal = {Groups, geometry, and dynamics},
     pages = {1007--1049},
     year = {2016},
     volume = {10},
     number = {3},
     doi = {10.4171/ggd/375},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/375/}
}