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@article{MAN_1996__305_2_182993, author = {D. M\"uller and T. Coulhon and J. Zienkiewicz}, title = {About {Riesz} transforms on the {Heisenberg} groups.}, journal = {Mathematische Annalen}, pages = {369--380}, publisher = {mathdoc}, volume = {305}, number = {2}, year = {1996}, zbl = {0859.22006}, url = {http://geodesic.mathdoc.fr/item/MAN_1996__305_2_182993/} }
D. Müller; T. Coulhon; J. Zienkiewicz. About Riesz transforms on the Heisenberg groups.. Mathematische Annalen, Tome 305 (1996) no. 2, pp. 369-380. http://geodesic.mathdoc.fr/item/MAN_1996__305_2_182993/