@article{DAN_1978_243_1_a1,
     author = {M. V. Karasev},
     title = {The asymptotic spectrum and oscillation front for operators with nonlinear commutation relations},
     journal = {Doklady Akademii Nauk},
     pages = {15--18},
     publisher = {mathdoc},
     volume = {243},
     number = {1},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_243_1_a1/}
}