@article{AFM_2013_38_1_a7,
     author = {Zolt\'an M. Balogh and Katrin F\"assler and Ioannis D. Platis},
     title = {Modulus method and radial stretch map in the {Heisenberg} group},
     journal = {Annales Fennici Mathematici},
     pages = {149--180},
     publisher = {mathdoc},
     volume = {38},
     number = {1},
     year = {2013},
     doi = {10.5186/aasfm.2013.3811},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.2013.3811/}
}