@article{JRAM_1991__414_153299,
     author = {S. Thangavelu},
     title = {Restriction theorems for the {Heisenberg} group.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {51--66},
     publisher = {mathdoc},
     volume = {414},
     year = {1991},
     zbl = {0708.43003},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1991__414_153299/}
}