@article{DAN_1995_341_6_a6,
     author = {A. M. Kerbelev},
     title = {Frequency criteria for the robustness of nonlinear systems with},
     journal = {Doklady Akademii Nauk},
     pages = {749--752},
     publisher = {mathdoc},
     volume = {341},
     number = {6},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1995_341_6_a6/}
}