@article{SIGMA_2009_5_a67,
     author = {D. Fox},
     title = {Boundaries of {Graphs} of {Harmonic} {Functions}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2009},
     volume = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2009_5_a67/}
}