@article{DE_2005_41_1_a3,
     author = {I. V. Gaishun},
     title = {Stability of linear {Hamiltonian} systems in total differentials with periodic coeficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {33--40},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2005_41_1_a3/}
}