@article{MZM_2014_95_6_a14,
     author = {Yu. N. Bibikov},
     title = {On the {Stability} of the {Equilibrium} {Position} of an {Oscillator} under {Periodic} {Perturbations}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {947--950},
     publisher = {mathdoc},
     volume = {95},
     number = {6},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2014_95_6_a14/}
}