@article{ZVMMF_2009_49_3_a9,
     author = {A. F. Kurin},
     title = {Spectral stability criterion and the {Cauchy} problem for the {Hill} equation at parametric resonance},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {498--511},
     publisher = {mathdoc},
     volume = {49},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2009_49_3_a9/}
}