@article{SM_2008_199_2_a7,
     author = {A. A. Yakovlev},
     title = {Adiabatic limits on {Riemannian} {Heisenberg} manifolds},
     journal = {Sbornik. Mathematics},
     pages = {307--318},
     publisher = {mathdoc},
     volume = {199},
     number = {2},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2008_199_2_a7/}
}