@article{IIGUM_2011_4_3_a0,
     author = {A. Yu. Aleksandrov and A. V. Platonov and A. A. Kosov},
     title = {On the preservation of instability of mechanical systems under the evolution of dissipative forces},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {3--19},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2011_4_3_a0/}
}