@article{DAN_1976_227_4_a4,
     author = {A. S. Dynin},
     title = {An algebra of pseudodifferential operators on the {Heisenberg} group. {Symbolic} calculus},
     journal = {Doklady Akademii Nauk},
     pages = {792--795},
     publisher = {mathdoc},
     volume = {227},
     number = {4},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_227_4_a4/}
}