@article{RM_2010_65_3_a10,
     author = {V. A. Zorich},
     title = {Asymptotic behaviour at infinity of the admissible growth of the quasi-conformality coefficient and the invertibility of contact immersions of the {Heisenberg} group},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {591--592},
     publisher = {mathdoc},
     volume = {65},
     number = {3},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2010_65_3_a10/}
}