@article{RM_1978_33_2_a12,
     author = {A. L. Likhtarnikov and V. A. Yakubovich},
     title = {Frequency theorems and a stabilization theorem for~unbounded
},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {235--236},
     publisher = {mathdoc},
     volume = {33},
     number = {2},
     year = {1978},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1978_33_2_a12/}
}