@article{MAN_1984__267_163877,
     author = {E.M. Stein and D. Geller},
     title = {Estimates for {Singular} {Convolution} {Operators} on the {Heisenberg} {Group.}},
     journal = {Mathematische Annalen},
     pages = {1--16},
     publisher = {mathdoc},
     volume = {267},
     year = {1984},
     zbl = {0537.43005},
     url = {http://geodesic.mathdoc.fr/item/MAN_1984__267_163877/}
}