@article{MZM_1994_56_2_a2,
     author = {V. V. Kisil},
     title = {Local behavior of two-sided convolution operators with singular kernels on the {Heisenberg} group},
     journal = {Matemati\v{c}eskie zametki},
     pages = {41--55},
     publisher = {mathdoc},
     volume = {56},
     number = {2},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1994_56_2_a2/}
}