@article{DAN_1983_272_2_a1,
     author = {N. A. Bobylev and M. A. Krasnosel'skii},
     title = {On the approximate construction of self-oscillatory regimes in automatic control systems},
     journal = {Doklady Akademii Nauk},
     pages = {267--271},
     publisher = {mathdoc},
     volume = {272},
     number = {2},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_272_2_a1/}
}