@article{10_4171_ggd_129,
     author = {Martin R. Bridson and Henry Wilton},
     title = {On the difficulty of presenting finitely presentable groups},
     journal = {Groups, geometry, and dynamics},
     pages = {301--325},
     year = {2011},
     volume = {5},
     number = {2},
     doi = {10.4171/ggd/129},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/129/}
}