@article{10_4171_ggd_149,
     author = {Josh Barnard and Noel Brady and Pallavi Dani},
     title = {Super-exponential 2-dimensional {Dehn} functions},
     journal = {Groups, geometry, and dynamics},
     pages = {1--51},
     year = {2012},
     volume = {6},
     number = {1},
     doi = {10.4171/ggd/149},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/149/}
}