@article{DAN_1969_184_5_a11,
     author = {K. F. Voitsekhovskaya},
     title = {Stability of second-order dynamic systems},
     journal = {Doklady Akademii Nauk},
     pages = {1061--1064},
     publisher = {mathdoc},
     volume = {184},
     number = {5},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_184_5_a11/}
}