@article{DAN_1991_316_2_a2,
     author = {V. S. Guliev},
     title = {Boundedness of singular integral operators on the {Heisenberg} group in weighted},
     journal = {Doklady Akademii Nauk},
     pages = {274--278},
     year = {1991},
     volume = {316},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_316_2_a2/}
}