@article{ZNSL_1999_261_a9,
     author = {S. A. Krat},
     title = {Asymptotic properties of the {Heisenberg} group},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {125--154},
     publisher = {mathdoc},
     volume = {261},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1999_261_a9/}
}