@article{DAN_1977_236_2_a4,
     author = {B. V. Viktorov},
     title = {On the applicability of the method of singular perturbations in the investigation of automatic control systems},
     journal = {Doklady Akademii Nauk},
     pages = {296--299},
     publisher = {mathdoc},
     volume = {236},
     number = {2},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_236_2_a4/}
}